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QUESTION

# How many valence electrons are in an atom of chlorine?

Chlorine has 7 valence electrons .

The of chlorine is 1s^2 2s^2 2p^6 3s^2 3p^5 or "[Ne]"3s^2 3p^5.

The 3s^2 3p^5 electrons are the outermost electrons, so chlorine has seven .

In a picture, the valence electrons are the ones in the outermost shell.

You can see in the diagram below that there are seven electrons in the outermost circle.

Additionally, a more basic way of determining the number of would be to simply look at what group Cl is in.

It is in Group 17, which means it has 7 valence electrons.