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svetoff [14.1K]
3 years ago
12

What do the groups (columns) and periods (rows) tell you about the elements on the periodic table?

Chemistry
2 answers:
-Dominant- [34]3 years ago
5 0

Answer:Groups: The vertical column of the periodic table that signifies the number of valence electrons in an element. Periods: The horizontal rows in the periodic table that signify the number of electron shells in an element.

Explanation:

The table has seven rows and 18 columns. Each row represents one period; the period number of an element indicates how many of its energy levels house electrons.The columns of the table represent groups, or families, of elements.

rewona [7]3 years ago
4 0

Answer:

<em><u>Groups:</u></em><em> The vertical column of the periodic table that signifies the number of valence electrons in an element. </em>

<em><u>Period:</u></em><em> The horizontal rows in the periodic table that signify the number of electron shells in an element.</em>

Explanation:

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