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PLEASE HELP ASAP! 20 POINTS BRAINLIEST IF RIGHT

Elements in the same ? have the same number of valence electrons.
Elements in the same ? have the same number of electron shells.
Metallic elements become ? reactive as you move left to right in a period.
Metallic elements become ? reactive as you move top to bottom in a group.

Respuesta :

elwinmartinez
if im not mistaken 
1 is columns 
2 is  columns
3 less
4 more
its been a long time so i could be wrong
juliana810

Elements in the same Group have the same number of valence electrons.


Elements in the same Period  have the same number of electron shells.


Metallic elements become Less reactive as you move left to right in a period.


Metallic elements become More  reactive as you move top to bottom in a group.