Multiple Choice
In the periodic table, the horizontal rows are called what?
4. Atoms and Elements
Periodic Table: Classifications
Multiple Choice
In the periodic table, what are the horizontal rows called?
A
Blocks
B
Groups
C
Periods
D
Families
Verified step by step guidance1
Understand that the periodic table is organized in two main directions: horizontally and vertically.
Recognize that the vertical columns in the periodic table are called 'Groups' or 'Families', which share similar chemical properties.
Know that the horizontal rows in the periodic table are called 'Periods'. Each period corresponds to the filling of a different electron shell.
Identify that 'Blocks' refer to sections of the periodic table based on electron subshells (s, p, d, f), not rows or columns.
Therefore, the correct term for the horizontal rows in the periodic table is 'Periods'.
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