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Physical Chemistry -- Atomic Structure
16.
Assume that the potential energy of a hydrogen atom in its ground state is
zero. Then its energy in the first excited state will be
- A.13.6 eV
- B.27.2 eV
- C.23.8 eV
- D.10.2 eV
- Answer
- Report
Answer : [C]
17.
The ratio of E2 – E1 to E4 – E3 for the hydrogen atom is approximately
equal to
- A.10
- B.15
- C.17
- D.12
- Answer
- Report
Answer : [B]
18.
The ionization energy of a hydrogen atom is 13.6 eV. The energy of the
third-lowest electronic level in doubly ionized lithium (Z = 3) is
- A.-28.7 eV
- B.-54.4 eV
- C.-122.4 eV
- D.-13.6 eV
- Answer
- Report
Answer : [C]
19.
What is the most probable distance from the nucleus at which a 2p
electron will be found in the hydrogen atom?
- A.53 pm
- B.106 pm
- C.212 pm
- D.26.5 pm
- Answer
- Report
Answer : [B]
20.
The energy needed to excite a hydrogen atom from its ground state to its
third excited state is
- A.12.1 eV
- B.10.2 eV
- C.0.85 eV
- D.12.75 eV
- Answer
- Report
Answer : [D]
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