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In a mixture of H- He^(+) gas (He+ is si...

In a mixture of `H- He^(+)` gas (`He+ `is singly ionized He atom), `H` atom and `He+` ions are excited to their respective first excited state. Subsequently `H` atoms transfer their total excitation energy to `He+` ions (by collisions) Assume that the bohr model of atom is exactly valid.
The quantum number `n` of the state finally populated in `He^(+)` inos is -

A

2

B

3

C

4

D

5

Text Solution

Verified by Experts

The correct Answer is:
C

For `H` atom `DeltaE=10.2 eV`, This goes to excite `He^(+)` ion from `n=2` to `n=4`
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In a mixture of H- He^(+) gas ( He+ is singly ionized He atom), H atom and He+ ions are excited to their respective first excited state. Subsequently H atoms transfer their total excitation energy to He+ ions (by collisions) Assume that the bohr model of atom is exactly valid. The wavelength of light emitted in the visible region by He+ lons after collisions with H atoms is -

In a mixture of H-He^(+) gas ( He^(+) is singly ionized He atom), H atoms and He^(+) ions are excited to their respective first excited states. Subsequently, H atoms transfer their total excitation energy to He^(+) ions (by collisions). Assume that the Bohr model of atom is exctly valid. The ratio of the kinetic energy of the n=2 electron for the H atom to that of He^(+) ion is:

Knowledge Check

  • The total energy of an electron in the first excited state of H atom is - 3.4 eV, then its potential energy in this state is ...eV.

    A
    `+3.4`
    B
    `-3.4`
    C
    `-6.8`
    D
    `+6.8`

  • The total energy of an electron in the first excited state of H -atom is – 3.4 eV, then its potential energy is in this state is _____ eV.

    A
    6.8
    B
    3.4
    C
    `-6.8`
    D
    `-3.4`

  • The ratio of energies of electron in the first excited state to its second excited state in H-atom is ......

    A
    `1:4`
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    `4:9`
    C
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