Multiple Choice
In the periodic table, the horizontal rows are called what?
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4. Atoms and Elements
Periodic Table: Group Names
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What are the horizontal rows on the periodic table called?
A
Families
B
Groups
C
Blocks
D
Periods
Verified step by step guidance1
Understand that the periodic table is organized in two main directions: horizontally and vertically.
Recognize that the vertical columns on the periodic table are called 'Groups' or 'Families', which contain elements with similar chemical properties.
Identify that the horizontal rows on the periodic table are called 'Periods'. Each period represents elements with increasing atomic number from left to right.
Note that 'Blocks' refer to sections of the periodic table based on electron configurations (s-block, p-block, d-block, f-block), not rows or columns.
Therefore, the correct term for the horizontal rows on the periodic table is 'Periods'.
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