How many valence electrons are found in Group 1A, 2A, 16 A, 17 A, 18 A?

Answer 1

Group 1: 1 valence electron
Group 2: 2 valence electrons
Group 16: 6 valence electrons
Group 17: 7 valence electrons

Can you guess what group 18 has? 8.

Answer 2

The number of valence electrons for the Periodic Table columns you ask about mostly correspond to the "ones" digit...which is also why the Periodic Table is organized the way it is.

So, 1A = 1 valence, 2A = 2, 3 = 3, etc, 16A = 6, 17A =7 and 18A = 8. Don't forget that "full" valence is 8, which is why the Noble Gasses are all in column 18A

Answer 3

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