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In the periodic table, what does the term "family" (or group) mean?
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4. Atoms and Elements
Periodic Table: Group Names
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In the periodic table, what does the term "family" (also called a group) refer to?
A
A vertical column of elements that have similar chemical properties
B
A set of elements arranged in order of decreasing atomic number
C
A horizontal row of elements that have the same number of electron shells
D
All elements that are gases at room temperature
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Understand that the periodic table is organized in two main directions: vertically and horizontally.
Recognize that a 'family' or 'group' in the periodic table refers to elements arranged in a vertical column.
Know that elements in the same family share similar chemical properties because they have the same number of valence electrons.
Contrast this with a 'period,' which is a horizontal row where elements have the same number of electron shells but different properties.
Therefore, the term 'family' or 'group' specifically means a vertical column of elements with similar chemical behavior.
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