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How many valence electrons do the alkaline earth metals have in their elemental state?
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10. Periodic Properties of the Elements
Valence Electrons of Elements
Multiple Choice
Halogens are elements found in Group 17 of the periodic table. How many valence electrons does a halogen atom typically possess?
A
5
B
2
C
7
D
8
검증된 단계별 안내1
Identify the group number of halogens in the periodic table, which is Group 17.
Recall that the group number for main-group elements corresponds to the number of valence electrons for those elements.
Since halogens are in Group 17, they have 7 valence electrons.
Understand that valence electrons are the electrons in the outermost shell of an atom and determine its chemical properties.
Therefore, a typical halogen atom possesses 7 valence electrons.
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