객관식
Most elements on the periodic table are classified as which type of element?
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4. Atoms and Elements
Periodic Table: Classifications
객관식
In the periodic table, the horizontal rows are called which of the following?
A
Families
B
Blocks
C
Periods
D
Groups
검증된 단계별 안내1
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 contain elements with similar chemical properties.
Know that the horizontal rows in the periodic table are called 'Periods'. Each period represents elements with the same number of electron shells.
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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