Step #1: Calculate the total number of valence electrons. Here, the given ion is ICl2- ion (iodine dichloride). In order to draw the lewis structure of ICl2-, first of all you have to find the total number of valence electrons present in the ICl2- ion. (Valence electrons are the number of electrons present in the outermost shell of an atom).What is the Lewis Structure of AsF 6 –? The Lewis structure of AsF 6 – is used to understand the outermost valence electrons that are involved in bonding in this molecule. This ion has octahedral geometry. This ion contains two As, and six F atoms. This compound carries one negative charge. The Lewis structure of AsF 6 – presents that …Steps of drawing OF2 lewis structure Step 1: Find the total valence electrons in OF2 molecule. In order to find the total valence electrons in OF2 (oxygen difluoride) molecule, first of all you should know the valence electrons present in oxygen atom as well as fluorine atom. (Valence electrons are the electrons that are present in …BrF 4– has one bromine atom and four fluorine atoms. In BrF 4– Lewis structure, there are four single bonds around the bromine atom, with four fluorine atoms attached to it, and on each fluorine atom, there are three lone pairs. Also, there is a negative (-1) charge on the bromine atom. Steps. #1 Draw a rough sketch of the structure.The present study reports an improved X-ray structure determination for monoclinic [Xe 2 F 3][AsF 6] and the crystal structures of trigonal [Xe 2 F 3][AsF 6] and [Xe 2 F 3][SbF 6]. The study demonstrates the strong dependance of the Xe···F b ···Xe bridge angle on the crystal packing and on the nature of the counter anion.Beryllium fluoride (BeF2) lewis dot structure, molecular geometry, electron geometry, polar or nonpolar, bond angle. Beryllium fluoride is an inorganic compound that appears as colorless lumps have a chemical formula BeF2. It is an odorless white solid also known as fluoride salt of beryllium. It is commonly used in biochemistry.Aug 15, 2020 · 1. The central atom, sulfur, contributes six valence electrons, and each fluorine atom has seven valence electrons, so the Lewis electron structure is. With an expanded valence, that this species is an exception to the octet rule. 2. There are six electron groups around the central atom, each a bonding pair. Carbon will be singly bonded to H, H, Cl, and Cl, as shown in the Lewis structure. The molecule is neutral, i.e., there is no charge on it. Let us calculate the formal charges on each of the constituent atoms. The formula for the formal charge is as follows. Formal charge (FC) = Valence electrons – 0.5*bonding electrons – non-bonding electronsJun 23, 2023AsF6- c. Cl3PO d. IF5. Science. Chemistry. Write Lewis structures for each molecule or ion. Use expanded octets as necessary.a. ClF5 b. AsF6- c. Cl3PO d. IF5. Write Lewis structures for each molecule or ion. Use expanded octets as necessary.a. ... Lewis structures of molecules are important for finding small molecule drug candidates for ...M12Q0: Drawing Conventions. Use and understand different representations of molecules: ball and stick model, space-filling model, molecular formula, Lewis structure, structural formula, condensed structural formula, dash-wedge formula, and line formula. In organic molecules, nearly all bonds involve the sharing of valence shell electrons ... To help you understand the Lewis Structure of AsF6-, we are going to share our step-by-step method using which one can find out the Lewis structure of any given molecule. AsF6- consists...This is the Lewis structure for AsF6-. Arsenic has 5 valence electrons and Fluorine has 7, but we have 6 Fluorines and this negative up here means we have an additional valence electron. Five plus 42 plus 1 equals 48 total valence electrons for the AsF6- Lewis structure. Arsenic is the least electronegative, we'll put that at the center and ... The total valence electron is available for the Silicon tetrachloride (SiCl4) lewis structure is 32. The hybridization of the SiCl4 molecule is Sp 3. The bond angle of SiCl4 is 109.5º. SiCl4 is nonpolar in nature, although, its bonds are polar. The overall formal charge in Silicon tetrachloride is zero.Hexafluoroarsenic(1-) | AsF6- | CID 23515 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities ...What is the Lewis Structure of AsF 6 –? The Lewis structure of AsF 6 – is used to understand the outermost valence electrons that are involved in bonding in this …What is the Lewis Structure of AsF 6 –? The Lewis structure of AsF 6 – is used to understand the outermost valence electrons that are involved in bonding in this molecule. This ion has octahedral geometry. This ion contains two As, and six F atoms. This compound carries one negative charge. The Lewis structure of AsF 6 – presents that …Lewis Structures for Covalent Molecules: Step-by-Step. Wayne Breslyn. 303. 12:35. Exceptions To The Octet Rule - Lewis Dot Diagrams. The Organic Chemistry Tutor. 153 ... 9781337398909. Author: Lawrence S. Brown, Tom Holme. Publisher: Cengage Learning. Solution for The heavier group 15 elements can expand their octets. Draw the Lewis structure for AsF6. Please include all nonbonding electrons and formal…. What is the Lewis structure of AsF6-? The Lewis structure of AsF6- consists of an Arsenic (As) atom surrounded by six Fluorine (F) atoms. The As atom shares a single bond with each F atom, and each F atom also has three lone pairs of electrons. The As atom has an expanded octet with 12 electrons. How does the octet rule apply to the AsF6 ... What is the Lewis Structure of AsF 6 –? The Lewis structure of AsF 6 – is used to understand the outermost valence electrons that are involved in bonding in this molecule. This ion has octahedral geometry. This ion contains two As, and six F atoms. This compound carries one negative charge. The Lewis structure of AsF 6 – presents that …What is the Lewis Structure of AsF 6 –? The Lewis structure of AsF 6 – is used to understand the outermost valence electrons that are involved in bonding in this molecule. This ion has octahedral geometry. This ion contains two As, and six F atoms. This compound carries one negative charge. The bond dipole moment is a measure for the polarity of a chemical bond within a molecule. The bond dipole μ is given by: Chemists generally measure electrical dipole moments in debyes, represented by the symbol D. The SI unit for dipole moment is the coulomb-meter (1 C m = 2.9979 1029 D), δ is the amount of charge in coulombs, and d is in ...The salt, [F3S⋮NXeF][AsF6], has been synthesized by the reaction of [XeF][AsF6] with liquid N⋮SF3 at −20 °C. The Xe−N bonded cation provides a rare example of xenon bound to an inorganic nitrogen base in which nitrogen is formally sp-hybridized. The F3S⋮NXeF+ cation was characterized by Raman spectroscopy at −150 °C and by …Oct 30, 2023 · Step 1: Draw the Lewis Structure & Resonance. Step 2: Combine the resonance structures by adding (dotted) bonds where other resonance bonds can be formed. Step 3: Add only the lone pairs found on ALL resonance structures. The bottom is the finished resonance hybrid for CO32-. 9781337398909. Author: Lawrence S. Brown, Tom Holme. Publisher: Cengage Learning. Solution for The heavier group 15 elements can expand their octets. Draw the Lewis structure for AsF6. Please include all nonbonding electrons and formal…. Draw a Lewis structure for SO3. Draw the Lewis structure of CH_3OH^ {2+}. Draw the Lewis structure for i) IF6^+ ii) XeF2 iii) NO3^-. Draw the Lewis structure for N2. Draw the Lewis structure of NOF. Draw Lewis structure of C_2 HO_4^-. Draw the Lewis structure for CH4. Draw the Lewis structure for O_2.The Lewis structure of the methane (CH4) molecule is drawn with four single shared covalent bonds between the carbon and hydrogen atoms each. Moreover, as there exist sigma bonds only and one 2s and three 2p orbitals of the carbon produce four new hybrid orbitals, the hybridization of CH4 is sp3. It is interesting to realize that …See Answer. Question: Part A Write a Lewis structure for each of the following molecules that are exceptions to the octet rule. Draw the molecule by placing atoms on the grid and connecting them with bonds. Include all lone pairs of electrons and nonbonding electrons. To change the symbol of an atom, double-click on the atom and enter the ...Question: How to do the lewis structure for AsF6-How to do the lewis structure for AsF6-Best Answer. This is the best answer based on feedback and ratings. AsF− 6. Molar mass. 188.91 g/mol. Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references. The hexafluoroarsenate (sometimes shortened to fluoroarsenate) anion is a chemical species with formula AsF− 6. Hexafluoroarsenate is relatively inert, being the conjugate ...The attempt to prepare hitherto unknown homopolyatomic cations of sulfur by the reaction of elemental sulfur with blue S8(AsF6)2 in liquid SO2/SO2ClF, led to red (in transmitted light) crystals identified crystallographically as S8(AsF6)2. The X-ray structure of this salt was redetermined with improved resolution and corrected for librational motion: monoclinic, …Introduction to Lewis structures. A Lewis structure is a way to show how atoms share electrons when they form a molecule. Lewis structures show all of the valence electrons in an atom or molecule. The valence …Crystallizations of CsAsF6/CsSbF6 were carried out in anhydrous hydrogen fluoride (aHF) at various molar ratios. The compositions of the grown single crystals as refined from the X-ray diffraction data correspond to Cs[As1-xSbxF6] (x = 0.13–0.87), which means that most probably all phases with x = 0–1 exist. They crystallize in the trigonal R …Question: Question 3 2 pts Determine the number of lone pairs are on the central atom in the Lewis Structure for each: SbCl5 = [ Select] AsFó [ Select] Here’s the best way to solve it.Summary. The total valence electrons available for drawing the Lewis dot structure of H2O are 8. The molecular geometry or shape of the water (H 2 O) molecule is bent or V-shaped. The ideal electron geometry of H 2 O is tetrahedral as there are a total of 4 electron density regions around the central O atom in H 2.Introduction to Lewis structures. A Lewis structure is a way to show how atoms share electrons when they form a molecule. Lewis structures show all of the valence electrons in an atom or molecule. The valence …Structure, properties, spectra, suppliers and links for: hexafluoroarsenate. Transition Metals and Coordination Compounds. Atomic Radius & Density of Transition Metals. Electron Configurations of Transition Metals. Electron Configurations of Transition Metals: Exceptions. Paramagnetism and Diamagnetism. Learn Lewis Dot Structures: Ions with free step-by-step video explanations and practice problems by experienced tutors.The Lewis structure of SF6 ( sulfur hexafluoride) consists of a central sulfur atom bonded to six fluorine atoms. The sulfur atom has six valence electrons, while each fluorine atom contributes one valence electron. The Lewis structure shows that SF6 has a total of 12 valence electrons, with all atoms achieving an octet configuration. SF6 is a ... Question: How to do the lewis structure for AsF6-How to do the lewis structure for AsF6-Best Answer. This is the best answer based on feedback and ratings. A step-by-step explanation of how to draw the NO+ Lewis Dot Structure (Nitronium ion).For the NO+ structure use the periodic table to find the total number o...Oct 30, 2023 · Step 1: Draw the Lewis Structure & Resonance. Step 2: Combine the resonance structures by adding (dotted) bonds where other resonance bonds can be formed. Step 3: Add only the lone pairs found on ALL resonance structures. The bottom is the finished resonance hybrid for CO32-. M12Q0: Drawing Conventions. Use and understand different representations of molecules: ball and stick model, space-filling model, molecular formula, Lewis structure, structural formula, condensed structural formula, dash-wedge formula, and line formula. In organic molecules, nearly all bonds involve the sharing of valence shell electrons ... AsF 4– has one arsenic atom and four fluorine atoms. In AsF 4– Lewis structure, there are four single bonds around the arsenic atom, with four fluorine atoms …Guided course. Lewis Dot Structures: Ions. Write Lewis structures for each molecule or ion. Use expanded octets as necessary. b. AsF6-. And for a Lewis structure of O = Xe( − F)2 ...around the xenon and the oxygen atoms there are TWO lone pairs ... around the fluorine atom there are THREE lone pairs... Given the influence of the lone pairs....we would anticipate that ∠F −Xe − F > 180∘ ..note that lone pairs SHOULD be stereochemically active in that as lone pairs they ...See Answer. Question: Part A Write a Lewis structure for each of the following molecules that are exceptions to the octet rule. Draw the molecule by placing atoms on the grid and connecting them with bonds. Include all lone pairs of electrons and nonbonding electrons. To change the symbol of an atom, double-click on the atom and enter the ...A step-by-step explanation of how to draw the SF6 Lewis Structure (Sulfur Hexafluoride) For the SF6 structure use the periodic table to find the total nu...A step-by-step explanation of how to draw the IBr3 Lewis Dot Structure (Iodine tribromide).For the IBr3 structure use the periodic table to find the total nu...Jun 23, 2023 · Step 2: Select the central atom. For selecting the center atom, you have to remember that the atom which is less electronegative remains at the center. Now here the given ion is NO4 3- ion and it contains nitrogen atom (N) and oxygen atoms (O). You can see the electronegativity values of nitrogen atom (N) and oxygen atom (O) in the above ... Molecular geometry is one of those properties, and we must understand the elemental arrangement from the Lewis structure to proceed. The Lewis structure observed tells us that the Arsenic has a steric number of 4 with three covalent bonds and one lone pair attached. This gives it a trigonal pyramidal molecular geometry. Now, let us study the steps involved to draw the Lewis structure of BrF5. Step 1: Find the total number of valence electrons one molecule of BrF5 has: It is 42 as 7 is coming from each of the fluorine and bromine atoms. Step 2: Find how many more valence electrons are required by one molecule of BrF5: It is 6 as one valence electron is required ...This is the Lewis structure for AsF6-. Arsenic has 5 valence electrons and Fluorine has 7, but we have 6 Fluorines and this negative up here means we have an additional valence electron. Five plus 42 plus 1 equals 48 total valence electrons for the AsF6- Lewis structure. Arsenic is the least electronegative, we'll put that at the center and ... Question: The heavier group 15 elements can expand their octets. Draw the Lewis structure for AsF6. Please include all nonbonding electrons and formal charge. Nov 2, 2020 · How to Draw a Lewis Structure for AsF4 Arsenic tetraFluoride?Lewis Structure: https://www.youtube.com/watch?v=4rRVPeeZRmc&list=PLDwv-O7TJyNjAB0ak6We0sQ8t_a7D... Now, let us study the steps involved to draw the Lewis structure of BrF5. Step 1: Find the total number of valence electrons one molecule of BrF5 has: It is 42 as 7 is coming from each of the fluorine and bromine atoms. Step 2: Find how many more valence electrons are required by one molecule of BrF5: It is 6 as one valence electron is required ...Draw Lewis structures for each of the following species. Use expanded octets as necessary. CIF3. Cl3PO. IF3. AsF6-. Draw the molecule by placing atoms on the grid and connecting them with bonds. Include all lone pairs of …The Lewis structure of the methane (CH4) molecule is drawn with four single shared covalent bonds between the carbon and hydrogen atoms each. Moreover, as there exist sigma bonds only and one 2s and three 2p orbitals of the carbon produce four new hybrid orbitals, the hybridization of CH4 is sp3. It is interesting to realize that …The Lewis structure of AsCl5 indicates the following things. 1. Atom arrangement: The Lewis structure of arsenic pentachloride indicates that, the central atom is arsenic. It is bonded with five Cl atoms and forms trigonal bipyramidal structure. Five chlorine atoms are arranged in five vertices. 2. This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Question: Draw Lewis structures for each of the following species. Use expanded octets as necessary. Part A ClF5 PART B AsF6− PART C Cl3PO PART D IF5. Draw Lewis structures for each of the following species.Preparation, spectroscopic properties, and crystal structures of Te6(AsF6)4.2AsF3 and Te6(AsF6)4.2SO2: a new trigonal-prismatic cluster cation, hexatellurium(4+) Robert C. Burns, Ronald J. Gillespie, Woon-Chung Luk ... X-ray Crystal Structure Determination, Lattice Potential Energy, and Energetics of Formation of the Salt S 4 ...The attempt to prepare hitherto unknown homopolyatomic cations of sulfur by the reaction of elemental sulfur with blue S8(AsF6)2 in liquid SO2/SO2ClF, led to red (in transmitted light) crystals identified crystallographically as S8(AsF6)2. The X-ray structure of this salt was redetermined with improved resolution and corrected for librational motion: monoclinic, …Verified by Toppr. Explanation: The Lewis structure of ammonia, N H 3, would be three hydrogen-bonded to a nitrogen atom in the middle, with a lone pair of electrons on top of the atom. This is the reason why ammonia acts as a Lewis base, as it can donate those electrons. Was this answer helpful?A step-by-step explanation of how to draw the ClF5 Lewis Dot Structure (Chlorine Pentafluoride).For the ClF5 structure use the periodic table to find the tot...🚀To book a personalized 1-on-1 tutoring session:👉Janine The Tutorhttps://janinethetutor.com🚀More proven OneClass Services you might be interested in:👉One...Oct 20, 2023 · BrF 4– has one bromine atom and four fluorine atoms. In BrF 4– Lewis structure, there are four single bonds around the bromine atom, with four fluorine atoms attached to it, and on each fluorine atom, there are three lone pairs. Also, there is a negative (-1) charge on the bromine atom. Steps. #1 Draw a rough sketch of the structure. See full list on knordslearning.com ISBN: 9781337398909. Author: Lawrence S. Brown, Tom Holme. Publisher: Cengage Learning. Solution for The heavier group 15 elements can expand their octets. Draw the Lewis structure for AsF6. Please include all nonbonding electrons and formal….Sulfur hexafluoride (SF6) Lewis dot structure, molecular geometry or shape, electron geometry, bond angle, formal charge. SF 6 is the chemical formula of a colorless, odorless gas called sulfur hexafluoride. Its molar mass is …1. The central atom, beryllium, contributes two valence electrons, and each hydrogen atom contributes one. The Lewis electron structure is. 2. There are two electron groups …🚀To book a personalized 1-on-1 tutoring session:👉Janine The Tutorhttps://janinethetutor.com🚀More proven OneClass Services you might be interested in:👉One...The Lewis structure of AsCl5 indicates the following things. 1. Atom arrangement: The Lewis structure of arsenic pentachloride indicates that, the central atom is arsenic. It is bonded with five Cl atoms and forms trigonal bipyramidal structure. Five chlorine atoms are arranged in five vertices. 2. Summary. The total valence electrons available for drawing the Lewis dot structure of H2O are 8. The molecular geometry or shape of the water (H 2 O) molecule is bent or V-shaped. The ideal electron geometry of H 2 O is tetrahedral as there are a total of 4 electron density regions around the central O atom in H 2.BrF 4– has one bromine atom and four fluorine atoms. In BrF 4– Lewis structure, there are four single bonds around the bromine atom, with four fluorine atoms attached to it, and on each fluorine atom, there are three lone pairs. Also, there is a negative (-1) charge on the bromine atom. Steps. #1 Draw a rough sketch of the structure.Drawing the Lewis Structure for AsF 6-Viewing Notes: With AsF 6-be sure to add an additional valence electron to your total because of the negative sign. There are a total of 48 valence electrons in AsF 6-. Arsenic (As) is the least electronegative and goes at the center of the Lewis structure. Summary. The total valence electrons available for drawing the Lewis dot structure of H2O are 8. The molecular geometry or shape of the water (H 2 O) molecule is bent or V-shaped. The ideal electron geometry of H 2 O is tetrahedral as there are a total of 4 electron density regions around the central O atom in H 2.The attempt to prepare hitherto unknown homopolyatomic cations of sulfur by the reaction of elemental sulfur with blue S8(AsF6)2 in liquid SO2/SO2ClF, led to red (in transmitted light) crystals identified crystallographically as S8(AsF6)2. The X-ray structure of this salt was redetermined with improved resolution and corrected for librational motion: monoclinic, …Now in the TeF5 molecule, you have to put the electron pairs between the tellurium atom (Te) and fluorine atoms (F). This indicates that the tellurium (Te) and fluorine (F) are chemically bonded with each other in a TeF5 molecule. Step 4: Make the outer atoms stable. Place the remaining valence electrons pair on the central atom.See full list on knordslearning.com The interactions between SbF6– and metal nanoclusters are of significance for customizing clusters from both structure and property aspects; however, the whole-segment monitoring of this customization remains challenging. In this work, by controlling the amount of introduced SbF6– anions, the step-by-step nanocluster evolutions from [Pt1Ag28(S …Feb 12, 2007 · Tetrafluoroarsanuide | AsF4- | CID 15804634 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities ... Oct 11, 2023 · The F-S-F atoms lie along a straight line at the center of the molecule forming a 180° bond angle. Conversely, a 90° bond angle is formed at the F-S-F position where the sulfur and the fluorine atoms lie at right angles to one another. All the S-F bond lengths in the SF 6 molecule are equivalent i.e., 156 pm. Question: The heavier group 15 elements can expand their octets. Draw the Lewis structure for AsF_6^-. You need not include the charge on the ion, but if you wish you can place it on the central atom. To change the atom, double-click on the atomic symbol. Please include all nonbonding electrons.A step-by-step explanation of how to draw the ICl4- Lewis Dot Structure (Tetrachloroiodide ion).For the ICl4- structure use the periodic table to find the to...Using Formal Charge to Predict Molecular Structure. The arrangement of atoms in a molecule or ion is called its molecular structure.In many cases, following the steps for writing Lewis structures may lead to more than one possible molecular structure—different multiple bond and lone-pair electron placements or different …
Writing Lewis Structures with the Octet Rule. For very simple molecules and molecular ions, we can write the Lewis structures by merely pairing up the unpaired electrons on the constituent atoms. See these examples: For more complicated molecules and molecular ions, it is helpful to follow the step-by-step procedure outlined here.. Yoga3 1024x450.jpeg
Jul 4, 2013 · A quick explanation of the molecular geometry of AsF5 including a description of the AsF5 bond angles.Helpful Resources:• How to Draw Lewis Structures: https... This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Question: Draw Lewis structures for each of the following species. Use expanded octets as necessary. Part A ClF5 PART B AsF6− PART C Cl3PO PART D IF5. Draw Lewis structures for each of the following species. Let us follow some steps to draw the Lewis structure of chlorine dioxide: Step 1: Find the total valence electrons in one molecule of chlorine dioxide. It is 20 as chlorine has 7 valence electrons and oxygen …Lewis Theory Debriefing. In the following neutralization reactions, classify each reactant as a Lewis acid or base. It will be helpful to draw Lewis structures! CO 2(g) +. OH -(aq) HCO 3-(aq) Lewis acid Lewis base. Lewis acid Lewis base.Apr 25, 2022 · Crystallizations of CsAsF6/CsSbF6 were carried out in anhydrous hydrogen fluoride (aHF) at various molar ratios. The compositions of the grown single crystals as refined from the X-ray diffraction data correspond to Cs[As1-xSbxF6] (x = 0.13–0.87), which means that most probably all phases with x = 0–1 exist. They crystallize in the trigonal R 3̅ space group (no. 147). As5+ and Sb5+ are ... This is the Lewis structure for AsF6-. Arsenic has 5 valence electrons and Fluorine has 7, but we have 6 Fluorines and this negative up here means we have an additional valence electron. Five plus 42 plus 1 equals 48 total valence electrons for the AsF6- Lewis structure. Arsenic is the least electronegative, we'll put that at the center and ...9781337398909. Author: Lawrence S. Brown, Tom Holme. Publisher: Cengage Learning. Solution for The heavier group 15 elements can expand their octets. Draw the Lewis structure for AsF6. Please include all nonbonding electrons and formal…. Lewis structure of a molecule helps in the figure out the molecular geometry, bond formation, boiling & melting point, etc. In AsF5, there are a total of 40 valence electrons present (35 from five fluorine atoms and 5 from the arsenic atom). The complete Lewis dot structure is shown in the above figure. Molecular Geometry of AsF5The CH4 molecule will have 109.5° bond angles as there is no distortion in its shape. Generally, the lone pairs in the molecule distort the shape of the molecule, which changes the molecule’s bond angles. But as there are no lone pairs of electrons in this molecule, H-C-H’s bond angle is 109.5°.Lewis structure of a water molecule. Lewis structures – also called Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures (LEDs) – are diagrams that show the bonding between atoms of a molecule, as well as the lone pairs of electrons that may exist in the molecule. A Lewis structure can be drawn for any …Drawing the Lewis Structure for AsF 6-Viewing Notes: With AsF 6-be sure to add an additional valence electron to your total because of the negative sign. There are a total of 48 valence electrons in AsF 6-. Arsenic (As) is the least electronegative and goes at the center of the Lewis structure. A quick explanation of the molecular geometry of XeO3 including a description of the XeO3 bond angles.Looking at the XeO3 Lewis structure we can see that the...This is the Lewis structure for AsF6-. Arsenic has 5 valence electrons and Fluorine has 7, but we have 6 Fluorines and this negative up here means we have an additional valence electron. Five plus 42 plus 1 equals 48 total valence electrons for the AsF6- Lewis structure. Arsenic is the least electronegative, we'll put that at the center and ....
