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6. The central selenium atom in selenium hexafluo-
ride forms an expanded octet. How many electron
pairs surround the central Se atom?
A. 4
C. 6
B. 5
D. 7

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sandlee09

Given what we know, we can confirm that when forming an expanded octet, selenium hexafluo ride will hold 6 pairs of shared electrons around its center selenium atom.

What is an expanded octet?

  • An expanded octet is when an atom can hold more than 8 valence electrons in its outer shell.
  • This is possible for those elements in period four of the periodic table.
  • Elements that are capable of this form what we call hypervalent compounds.

Therefore, given that during an expanded octet formation, the central atom is capable of holding more than 8 valence electrons in its outer shell, the central atom of a selenium hexafluo ride compound will have 12 electrons being shared, which results in 6 pairs, making C the correct answer.

To learn more about valence electrons visit:

https://brainly.com/question/7223122?referrer=searchResults