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A period is a horizontal row on the periodic table. a. True b. False
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1 vote
A period is a horizontal row on the periodic table.
a. True
b. False

User Deniss Fedotovs
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1 Answer

5 votes
It is True because in the periodic table of elements, there are seven horizontal rows of elements called periods. The vertical columns of elements are called groups, or families.
User Greg Soltis
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