Question

Why do He and Ne then have different numbers of electrons in their outer shells?
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Help Please..

Answer 1

The family or column number will tell you the number of outer electrons for each element in that family. There are some exceptions....the transition metals and Helium.

Number of Electrons in the
Outer Shell with element name:

1 Hydrogen
2 Helium (shell complete)

1 Lithium
2 Beryllium
3 Boron
4 Carbon
5 Nitrogen
6 Oxygen
7 Fluorine
8 Neon (shell complete)