Question

Among the elements of the main group, the general trend in the first ionization energy moving across a period is not followed between group 2 and group 13. Which best explains these exceptions? A). The ionization energy decreases because the full s orbital shields the electron entering the p orbital. B). The ionization energy increases because the full s orbital shields the electron entering the p orbital. C). The ionization energy decreases because the stability of the half-full p subshell is increased. D). The ionization energy increases because the stability of the half-full p subshell is increased.

Answer 1

A is the answer
The ionization energy decreases because the full s orbital shields the electron entering the p orbital

Answer 2

Answer:

A

Explanation:

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