07-11-2017
Chemistry

contestada

Periods, or horizontal rows, are arranged so that elements with similar properties fall into the same (2 points) states. group. block. row.

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ilikepandabears ilikepandabears

08-11-2017

It is groups I think

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serenabrown488 serenabrown488

03-07-2018

The correct answer is Groups

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