Select the correct electron configurations from the list below. You can refer to the periodic table for atomic numbers. Check all that apply.

A) The electron configuration of O2 - is [He]2s22p6.

B) The electron configuration of Cs is [Xe]6s05d1.

C) The electron configuration of Ag + is [Kr]5s14d9.

D) The electron configuration of Si is [Ne]3s23p2.

E) The electron configuration of Ni is [Ar]4s23d8.

Question

Chemistry

Maurice Russo

8 August, 13:00

Select the correct electron configurations from the list below. You can refer to the periodic table for atomic numbers. Check all that apply.

A) The electron configuration of O2 - is [He]2s22p6.

B) The electron configuration of Cs is [Xe]6s05d1.

C) The electron configuration of Ag + is [Kr]5s14d9.

D) The electron configuration of Si is [Ne]3s23p2.

E) The electron configuration of Ni is [Ar]4s23d8.

+3

Answers (1)

Know the Answer?

Skyler Andrade · Answer 1

Corrects answer are Option A and Option D

Explanation:

[He]2s22p4 → This is the electron configuration for O, but if you have the anion, oxide it means that it gain 2 electrons. That's why you have 2 more e - in last cape.

[Ne]3s23p2 → The correct electron configuration for Si.

Si is an element from group 14. Its oxidation state is 4-',

with a tendency to lose 4 electrons, the 2 of level 3s and level 3p. 4 electrons are being necessary to reach the gas noble configuration.