Which electron configuration represents the electrons in an atom of chlorine in an excited state?

(1) 2-7-7 (3) 2-8-7

(2) 2-7-8 (4) 2-8-8

Question

Chemistry

Cheerio

29 October, 18:13

Which electron configuration represents the electrons in an atom of chlorine in an excited state?

(1) 2-7-7 (3) 2-8-7

(2) 2-7-8 (4) 2-8-8

+5

Answers (1)

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Elaine Best · Answer 1

Electron transfiguration shows the arrangement of electrons in the energy levels.

atomic number of chlorine is 17

The electron configuration of Cl in the ground state is 2,8,7

To become stable Cl should have a complete octet, Cl has 7 electrons in the outermost shell and it needs to one more electron to become stable

Therefore it takes in one electron becomes stable

Then electron configuration in excited state is

2,8,8

Answer is 4) 2,8,8

Which electron configuration represents the electrons in an atom of chlorine in an excited state?(1) 2-7-7 (3) 2-8-7(2) 2-7-8 (4) 2-8-8

Which electron configuration represents the electrons in an atom of chlorine in an excited state?

(1) 2-7-7 (3) 2-8-7

(2) 2-7-8 (4) 2-8-8