Answer:
[Ar] 3d10 4s2 4p4
Explanation:
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p4
Halogens (atoms with 7 valence electrons) and Hydrogen
or generally, atoms with their shells almost full
Your answer is B. radio waves have shorter wavelenghts than microwaves.
Have a great day
Dry air is a mixture of nitrogen, oxygen, carbon dioxide etc.
air is a mixture of gases 78% nitrogen an 21% oxygen and other components.
