Multiple Choice
Which characteristic is commonly shared by elements within the same group on the periodic table?
2. Atoms & Elements
Periodic Table: Group Names
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Which group in the periodic table contains elements that all have the same number of valence electrons?
A
Group 1 (alkali metals)
B
Group 2 (alkaline earth metals)
C
Group 17 (halogens)
D
Group 18 (noble gases)
Verified step by step guidance1
Understand that elements in the periodic table are arranged in groups (columns) where elements typically share similar chemical properties.
Recall that the number of valence electrons (electrons in the outermost shell) determines an element's chemical behavior and is the same for all elements within a group.
Identify the groups given: Group 1 (alkali metals), Group 2 (alkaline earth metals), Group 17 (halogens), and Group 18 (noble gases).
Remember that Group 1 elements all have 1 valence electron, Group 2 have 2 valence electrons, Group 17 have 7 valence electrons, and Group 18 have 8 valence electrons (except helium which has 2).
Conclude that each group listed contains elements with the same number of valence electrons, so all these groups fit the description of having elements with the same number of valence electrons.
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