Chapter 11: Problem 22
The colour of the \(X_{2}\) molecules of group 17 elements changes gradually from yellow to violet down the group. This is due to [A] the physical state of \(\mathrm{X}_{2}\) at room temperature changes from gas to solid down the group [B] decrease in ionization energy down the group [C] decrease in \(\pi^{*}-\sigma^{*}\) gap down the group [D] decrease in HOMO-LUMO gap down the group
Short Answer
Step by step solution
Key Concepts
These are the key concepts you need to understand to accurately answer the question.