How do you identify the number of valence electrons in an element using periodic table

Question

Elise Benton

Physics

15 June, 13:17

How do you identify the number of valence electrons in an element using periodic table

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Answers (1)

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Darwin Lam · Answer 1

You may look at what group they are in

Group

1A=Group 1

2A = Group 2

3A = Group 13

4A = Group 14

5A=Group 15

6A=Group 16

7A=Group 17

The #A tells you how many valence electrons there are by the # before A. Such as Chlorine, which is in 7A, so therefore has 7 valence electrons.