The modern periodic table of elements contains 18_____

asked Sep 16, 2021 51.6k views

5 votes

by Reiko

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0 votes

Answer: Groups

Step-by-step explanation:

Matthew Van Boheemen answered Sep 17, 2021

6.9k points

1 vote

Answer:

groups

Step-by-step explanation:

periods are left and right groups are up and down

G Davison answered Sep 20, 2021

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