1.

Which of the following order is correct for the first ionization energies of their elements?

A. B u003c Be u003c N u003c O
B. Be u003c B u003c N u003c O
C. B u003c Be u003c O u003c N
D. B u003c O u003c Be u003c N
Answer» D. B u003c O u003c Be u003c N


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