Structure 2.2.13, 2.2.14 - Molecules w expanded Octet (central atom w > 8 valence e-)

Question 1

What is the formal charge used in

Answer 1

used in determining the preferrred lewis structure when multiple diffrent structures (or non-equivalent) structures are possible for the same molecule

Question 2

what period elements can expand their v shell

Answer 2

non metal atoms in period 3-7 can expand their v shell to include more than 8 vlaence e-

Question 3

how do period 3-7 elements expand their v shell

Answer 3

by accessing the d orbital

Question 4

what does a central atom w an expanded octet result in

Answer 4

2 or more possible lewis structures

Question 5

formal charge formula

Answer 5

FC = (# of valence e- in unbonded atom) - (# of e- assigned to atom in lewis formula)

Question 6

what FC value is preferred

Answer 6

0

Question 7

what does a low FC mean

Answer 7

means a more covalent molecule, as the difference in charge density is small

Question 8

what to do for structures where FC is not 0

Answer 8

choose the structure where the more electronegative element gets the more negatvie formal charge.