Question

The electronic configuration of four elements are 1. $[ Xe ] 6x^1$ 2. $[ Xe ] 4 f^{ 14} \, 5d^1 \, 6s^2$ 3. $[ A r ] 4s^2 \, 4p^5$ 4. $[ A r ] 3d^7 \, 4s^2$ Which one of the following statements about these elements is not correct?

• A. 1 is a strong reducing agent.
• B. 2 is a d-block element
• C. 3 has high electron affinity.
• D. 4 shows variable oxidation state.

Answer 1

Answer: (B)

2 is a d-block element

Answer 2

$[ Xe ] 4 f^{ 14} \, 5d^1 \, 6s^2$ is not ad-block element. It is lutetium and is present in lanthanide series, so lutetium is a f block element.