Multiple Choice
How are the elements on the periodic table primarily arranged?
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2. Atoms & Elements
Periodic Table: Classifications
Multiple Choice
What is the term used to refer to the rows in the periodic table?
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.
The horizontal rows in the periodic table are called \(\textbf{Periods}\). Each period corresponds to the filling of a principal energy level of electrons.
The vertical columns in the periodic table are called \(\textbf{Groups}\) or \(\textbf{Families}\), which contain elements with similar chemical properties.
Blocks refer to sections of the periodic table based on electron subshells (s, p, d, f blocks), not rows or columns.
Therefore, the term used to refer to the rows in the periodic table is \(\textbf{Periods}\).
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