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Zarrin [17]
3 years ago
6

Each up-and-down column of elements on the periodic table.

Biology
1 answer:
stich3 [128]3 years ago
4 0

Answer:

Groups are the vertical columns

Explanation:

Periodic law states that when elements are listed in order of their atomic masses they automatically fall into similar groups.

A period is the horizontal organization.

Answer D is irrelevant.

So the answer is B! Group!

Hope this helped!!!!

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