Physics Crash Course NEET>Chapter 20 - Atoms and Nuclei>Level 3>Q 28

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Earn 100

When an $α$ -particle captures an electron it becomes

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Important Questions on Atoms and Nuclei

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Physics Crash Course NEET>Chapter 20 - Atoms and Nuclei>Level 3>Q 29

The neutron, proton, electron and alpha particles are moving with equal kinetic energies. How can the particles be arranged in the increasing order of their velocities?

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Physics Crash Course NEET>Chapter 20 - Atoms and Nuclei>Level 3>Q 30

The second line in the Paschen series is obtained when the electron makes the transition from

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Physics Crash Course NEET>Chapter 20 - Atoms and Nuclei>Level 3>Q 31

In which of the following systems will the wavelength corresponding to

n = 2

to

n = 1

be minimum?

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Physics Crash Course NEET>Chapter 20 - Atoms and Nuclei>Level 3>Q 32

The ratio of wavelengths of the last line of Balmer series and the last line of Lyman series is

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Physics Crash Course NEET>Chapter 20 - Atoms and Nuclei>Level 3>Q 33

In any fission process, the ratio

= \frac{mass of fission products}{mass of parent nucleus}

is

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Physics Crash Course NEET>Chapter 20 - Atoms and Nuclei>Level 3>Q 34

If the binding energy per nucleon of the deuteron is

1.115 MeV

its mass defect in the atomic mass unit is

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Physics Crash Course NEET>Chapter 20 - Atoms and Nuclei>Level 3>Q 35

The masses of nucleus, neutrons and protons are

M, m_{n}

and

m_{p}

, respectively. If the nucleus has been divided into neutrons and protons, then,

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Physics Crash Course NEET>Chapter 20 - Atoms and Nuclei>Level 3>Q 36

Assuming that about

20 MeV

of energy is released per fusion reaction,

H^{2} + {}_{1}H^{3} \to {}_{0}n^{1} + {}_{2}{He}^{4},

the mass of

{}_{1}H^{2}

consumed per day in a future fusion reactor of power

1 MW

would be approximately