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Which part of an atom is primarily involved in chemical reactions?
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10. Periodic Properties of the Elements
Valence Electrons of Elements
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How many valence electrons do the alkaline earth metals possess?
A
8
B
2
C
4
D
1
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Identify the group in the periodic table to which alkaline earth metals belong. They are found 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.
Understand that valence electrons are the electrons in the outermost shell of an atom and determine chemical reactivity.
Therefore, the number of valence electrons for alkaline earth metals is 2.
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