1
Q
group number =
A
valence
2
Q
period=
A
Energy level
3
Q
group number =
A
valence
4
Q
period=
A
Energy level
5
Q
group number =
A
valence
6
Q
period=
A
Energy level
group number =
valence
period=
Energy level
group number =
valence
period=
Energy level
group number =
valence
period=
Energy level
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