An element has the electronic configuration 2, 8, 2. Its position in the modern periodic table is
A. group 3, period 2
B. group 12, period 3
C. group 2, period 2
D. group 2, period 3
1 answer
Best answer
Answer: D. group 2, period 3
Three shells means period 3; two valence electrons means group 2. The element is magnesium.
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· 24 Oct 2026
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