PLEASE HELP ASAP! 20 POINTS BRAINLIEST IF RIGHT
2 answers:
If im not mistaken
1 is columns
2 is columns
3 less
4 more
its been a long time so i could be wrong
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.
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