試題詳解

3. The energy expressions for the electrons in the He⁺ ion and the hydrogen atom are
En (H) = -a/n² and En (He⁺) = -4a/n²

Which of the following statements is(are) correct?

I. For the transitions n₁ → n₂, the frequency is larger for H than for He⁺.

II. The first ionization energy of the H atom is smaller than the second ionization energy of the He atom.

III. The 1s orbital in He⁺ is larger (in the sense that the probability density is shifted outward) than the 1s orbital in H.
(A) I only
(B) II only
(C) III only
(D) I and II only E) I, II, and III