The radius of a hydrogen shell is 0.53Å. In its first excited state, radius of the shell will be:
1. 2.12 Å
2. 1.06 Å
3. 8.5 Å
4. 4.24 Å

Subtopic:  Bohr's Theory |
 81%
Level 1: 80%+
AIPMT - 1998
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The ionization energy required to remove an electron from the second orbit of \(\text{Li}^{2+}\) is:
1.  122.4 eV
2.  40.8 eV
3.  30.6 eV
4.  13.6 eV

Subtopic:  Bohr's Theory |
 71%
Level 2: 60%+
AIPMT - 1999
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In the Hydrogen atom, the energy of the first excited state is – 3.4 eV. Then find out K.E(kinetic energy) of the same orbit of the Hydrogen atom:

1. + 3.4 eV

2. + 6.8 eV

3. – 13.6 eV

4. + 13.6 eV

Subtopic:  Bohr's Theory |
 82%
Level 1: 80%+
AIPMT - 2002
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If the energy of the second Bohr orbit of the hydrogen atom is –328 kJ mol–1, the energy of the fourth Bohr orbit would be:

1. –1312 kJ mol–1 2. –82 kJ mol–1
3. –41 kJ mol–1 4. –164 kJ mol–1
Subtopic:  Bohr's Theory |
 76%
Level 2: 60%+
AIPMT - 2005
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