The electronic configuration of four elements are 1. [ Xe ] 6x1 2. [ Xe ] 4 f 14 5d1 6s2 3. [ A r ] 4s2 4p5 4. [ A r ] 3d7 4s2 Which one of the following statements about these elements is not correct?

Question

The electronic configuration of four elements are 1. [ Xe ] 6x1 2. [ Xe ] 4 f 14 5d1 6s2 3. [ A r ] 4s2 4p5 4. [ A r ] 3d7 4s2 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.

Tardigrade Admin · Accepted Answer

[ Xe ] 4 f 14 5d1 6s2 is not ad-block element. It is lutetium and is present in lanthanide series, so lutetium is a f block element.

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

1 is a strong reducing agent.

2 is a d-block element

3 has high electron affinity.

4 shows variable oxidation state.

The compound formed between 1 and 3 is ionic.

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

Q. The electronic configuration of four elements are 1. [Xe]6x1 2. [Xe]4f145d16s2 3. [Ar]4s24p5 4. [Ar]3d74s2 Which one of the following statements about these elements is not correct?