How to Draw the Lewis Dot Structure for SF5

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A step-by-step explanation of how to draw the SF5- Lewis Dot Structure. The molecular geometry is square pyramidal and the bond angles are 90 degrees. • Note: we should put brackets and a negative sign around the lewis structure with a negative sign outside to show the charge since this is an ion. • For the SF5- structure use the periodic table to find the total number of valence electrons for the SF5- molecule. Once we know how many valence electrons there are in SF5- we can distribute them around the central atom with the goal of filling the outer shells of each atom. • In the Lewis structure of SF5- structure there are a total of 42 valence electrons. • Note that SF5- can have an Expanded Octet and have more than eight valence electrons. Because of this there may be several possible Lewis Structures. To arrive at the most favorable Lewis Structure we need to consider formal charges. See how to calculate formal charges: • Formal Charges: Calculating Formal Ch... • ---- Steps to Write Lewis Structure for compounds like SF5 ------ • 1. Find the total valence electrons for the SF5- molecule. • 2. Put the least electronegative atom in the center. Note: Hydrogen (H) always goes outside. • 3. Put two electrons between atoms to form a chemical bond. • 4. Complete octets on outside atoms. • 5. If central atom does not have an octet, move electrons from outer atoms to form double or triple bonds. • ---- Lewis Resources ---- • • Lewis Structures Made Simple: • How to Draw Lewis Structures: Five Ea... • • More practice: • Lewis Dot Structure Practice Problems... • • Counting Valence Electrons: • Finding the Number of Valence Electro... • • Calculating Formal Charge: • Formal Charges: Calculating Formal Ch... • • Exceptions to the Octet Rule: • Exceptions to the Octet Rule • Lewis Structures, also called Electron Dot Structures, are important to learn because they help us understand how atoms and electrons are arranged in a molecule, such as . This can help us determine the molecular geometry, how the molecule might react with other molecules, and some of the physical properties of the molecule (like boiling point and surface tension). • Chemistry help at https://www.Breslyn.org

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