Multiple Choice
What are the horizontal rows on the periodic table called?
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4. Atoms and Elements
Periodic Table: Classifications
Multiple Choice
In the periodic table, the horizontal rows are called what?
A
Blocks
B
Periods
C
Families
D
Groups
Verified step by step guidance1
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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