74. An electron is promoted from the π to the π∗ molecular orbital in an O2 molecule following the absorption of a photon. Compared to the bond length in the non-excited molecule, the O2 bond length will .
(A) be shorter
(B) be longer
(C) not be affected
(D) be same
(E) None of the above.
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見圖,原本的鍵級是(8-4)/2 = ...
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原本題目:74. An electron...
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