阿摩線上測驗
23. Which statements about hydrogen are true? I: H has a lower ionization energy than He； II: H- is smaller than H； III: H has a higher effective nuclear charge than He； IV: H is always a metal； V: H does not have a second ionization energy.
(A) I, V
(B) II, IV
(C) I, III, V
(D) II, IV, V
(E) I, III, IV, V
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統計： A(1), B(0), C(0), D(0), E(0) #3371108
統計： A(1), B(0), C(0), D(0), E(0) #3371108
