Multiple Choice
In the periodic table, the horizontal rows are called what?
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4. Atoms and Elements
Periodic Table: Classifications
Multiple Choice
In the periodic table, what are the horizontal rows called?
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.
Recognize that the horizontal rows in the periodic table are called 'Periods'.
Know that each period corresponds to the filling of a different electron shell or energy level in atoms.
Differentiate between 'Periods' (horizontal rows) and 'Groups' or 'Families' (vertical columns) in the periodic table.
Remember that 'Blocks' refer to sections of the periodic table based on electron subshells (s, p, d, f), not rows or columns.
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