객관식
How many valence electrons does a neutral atom of chlorine possess?
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10. Periodic Properties of the Elements
Valence Electrons of Elements
객관식
How many valence electrons does phosphorus (P) have?
A
7
B
3
C
5
D
8
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검증된 단계별 안내1
Identify the element in question, which is phosphorus (P).
Determine the group number of phosphorus in the periodic table. Phosphorus is in group 15 (or group V in older notation).
Recall that the group number for main-group elements corresponds to the number of valence electrons for that element.
Since phosphorus is in group 15, it has 5 valence electrons.
Therefore, the number of valence electrons in phosphorus is 5.
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