Which one of the following is the correct electronic configuration of chlorine?

2, 7, 8

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2, 8, 7

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2, 8, 8

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7, 8, 2

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Solution

The correct option is B 2, 8, 7
Chlorine has atomic number 17. Its electronic configuration is 2, 8, 7. It is the second-lightest of the halogens, it appears between fluorine and bromine in the periodic table.

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2, 8, 7.

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