객관식
How many electrons are present in the outer (valence) shell of an Al^{3+} ion?
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10. Periodic Properties of the Elements
Valence Electrons of Elements
객관식
How many valence electrons do the alkaline earth metals have in their elemental state?
A
8
B
2
C
1
D
4
검증된 단계별 안내1
Identify the group of alkaline earth metals in the periodic table. They are located in Group 2.
Recall that the group number for main group elements corresponds to the number of valence electrons for those elements.
Since alkaline earth metals are in Group 2, they have 2 valence electrons in their outermost shell.
Understand that valence electrons are the electrons involved in chemical bonding and determine the chemical properties of the element.
Therefore, the number of valence electrons for alkaline earth metals in their elemental state is 2.
