The ground state energy of H-atom is 13.6 eV. The energy needed to ionise H-atom from its second excited state [1991]

1. 1.51 eV

2. 3.4 eV

3. 13.6 eV

4. 12.1 eV

Subtopic:  Bohr's Model of Atom |
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The given diagram indicates the energy levels of a certain atom. When the system moves from the 2E level to E, a photon of wavelength λ is emitted. What is the wavelength of the photon produced during its transition from the 4E3 level to E?

      

1. λ3 

2. 3λ4 

3. 4λ3 

4. 3λ

Subtopic:  Spectral Series |
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The wavelength of the first spectral line in the Balmer series of hydrogen atom is 6561 A0. The wavelength of the second spectral line in the Balmer series of singly ionized helium atom is [IIT-JEE 2011]

1. 1215 A0 

2. 1640 A0

3. 2430 A0 

4. 4687 A0

Subtopic:  Spectral Series |
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Energy E of a hydrogen atom with principal quantum number n is given by E=-13.6n2eV.  The energy of a photon ejected when the electron jumps from n = 3 state to n = 2 state of hydrogen, is approximately [2004]

1. 1.5 eV 

2. 0.85 eV 

3. 3.4 eV 

4. 1.9 eV

Subtopic:  Bohr's Model of Atom |
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The energy of ground electronic state of hydrogen atom is -13.6 eV.  The energy of the first excited state will be [1997]

1. -54.4 eV 

2. -27.2 eV

3. -6.8 eV 

4. -3.4 eV

Subtopic:  Bohr's Model of Atom |
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The total energy of an electron in the first excited state of hydrogen is about -3.4 eV. Its kinetic energy in this state is [2005]

1. -3.4 eV

2. -6.8 eV 

3. 6.8 eV 

4. 3.4 eV

Subtopic:  Bohr's Model of Atom |
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When hydrogen atom is in its first excited level, its radius is [1997]

1. four times, its ground state radius

2. twice, its ground state radius

3. same as its ground state radius

4. half of its ground state radius

Subtopic:  Bohr's Model of Atom |
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The ionisation potential of helium atom is 24.6 volt, the energy required to ionise it will be

1. 24.6 eV 

2. 24.6 volt 

3. 13.6 volt 

4.13..6 eV

Subtopic:  Various Atomic Models |
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The ionization energy of 10 times ionized sodium atom is:

1. 13.6 eV 

2. 13.6×11 eV 

3. 13.611eV 

4. 13.6×(11)2 eV

Subtopic:  Bohr's Model of Atom |
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The ionisation energy of hydrogen atom is 13.6 eV, the ionisation energy of helium atom would be [1988]

1. 13.6 eV

2. 27.2 eV 

3. 6.8 eV

4. 54.4 eV

Subtopic:  Bohr's Model of Atom |
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