AP Chemistryeasymcq1 pt
Elements in which group have a valence configuration of ns² np⁵?
A.Halogens (Group 17)
B.Alkali metals (Group 1)
C.Noble gases (Group 18)
D.Alkaline earths (Group 2)
Explanation
Core Concept
Seven valence electrons (2 s + 5 p) place an element one short of a noble-gas octet. That configuration defines the halogens — fluorine through astatine.
Correct Answer
AHalogens (Group 17)
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