Question

question 25
is this a valid lewis structure for clf₅? choose the best answer below.
no, because there are too many valence electrons in this structure.
yes, because f can have an expanded octet while cl cannot.
yes, because cl can have an expanded octet but f cannot.
no, because cl has too many electrons around it.
question 26
select the best lewis structure for xef₂.

Explanation:

For ClF₅: Cl (period 3) can expand octet; F (period 2) cannot. The structure shows F with octet (8e⁻) and Cl with expanded octet, which is valid.
For XeF₂: Xe (noble gas, period 5) expands octet. Total valence e⁻: 8 + 2×7=22. Xe forms 2 single bonds (4e⁻) and has 3 lone pairs (6e⁻); F has 3 lone pairs (6e⁻ each), totaling 22e⁻. Single bonds and Xe with 3 lone pairs are correct.

Answer:

Question 25: C. Yes, because Cl can have an expanded octet but F cannot.
Question 26: (Assuming the option with Xe having 3 lone pairs and single bonds to F) The correct Lewis structure for XeF₂ has single bonds between Xe and F, with Xe having 3 lone pairs and each F having 3 lone pairs. (Note: Without the exact image, the best choice is the option showing single bonds and Xe with 3 lone pairs.)