Which of the following has lowest ionization energy? a: beryllium b: oxygen c: boron d: carbon

Beryllium because it's a metal which is in nature usually found as cations held together by delocalized electrons and there is also a trend on the periodic table which suggests that ionization energy increases from left to right across a period and decreases from top to bottom down a group

Ithink it’s 3 as the answer.

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