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What are the horizontal rows on the periodic table called?
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4. Atoms and Elements
Periodic Table: Classifications
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In the periodic table, the horizontal rows are called what?
A
Blocks
B
Periods
C
Families
D
Groups
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Understand that the periodic table is organized in two main directions: horizontally and vertically.
Recall that the horizontal rows in the periodic table are called 'Periods'.
Recognize that 'Groups' or 'Families' refer to the vertical columns in the periodic table.
Note that 'Blocks' refer to sections of the periodic table based on electron configurations (s, p, d, f blocks), not rows or columns.
Therefore, the correct term for the horizontal rows in the periodic table is 'Periods'.
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