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prisoha [69]
3 years ago
13

PLEASE HELP ASAP! 20 POINTS BRAINLIEST IF RIGHT

Mathematics
2 answers:
Yanka [14]3 years ago
7 0
If im not mistaken 
1 is columns 
2 is  columns
3 less
4 more
its been a long time so i could be wrong
Harman [31]3 years ago
3 0

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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