Which of the following electronic configuration in the outermost two shells is characteristic of the alkaline earth metals?
Which of the following electronic configuration in the outermost two shells is characteristic of the alkaline earth metals?
A. `(n-1)s^(2)p^(6)ns^(1)`
B. `(n-1)s^(2)p^(6)d^(10)ns^(1)`
C. `(n-1)s^(2)p^(6)ns^(2)np^(1)`
D. `(n-1)s^(2)p^(6)np^(1)`.
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