Multiple Choice
In the modern periodic table, elements are arranged in order of increasing which property?
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4. Atoms and Elements
Periodic Table: Classifications
Multiple Choice
In the periodic table, the horizontal rows are called what?
A
Groups
B
Periods
C
Blocks
D
Families
Verified step by step guidance1
Understand that the periodic table is organized in two main directions: horizontally and vertically.
Recall that the vertical columns in the periodic table are called 'Groups' or 'Families', which share similar chemical properties.
Recognize that the horizontal rows in the periodic table are called 'Periods'.
Each period corresponds to the filling of a different electron shell in the atoms of the elements in that row.
Therefore, the correct term for the horizontal rows in the periodic table is 'Periods'.
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