21st Nov Atoms and Nuclie Quiz 1 – Punjab Meritorious School Preparation Portal

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Two particles of masses m₁, m₂move with initial velocities u₁and u_2. On collision, one of the particles get excited to higher level, after absorbing energy . If final velocities of particles be v₁ and v₂ then we must have

For which one of the following, Bohr model is not valid?

The transition from the state n = 3 to n = 1 in a hydrogen like atom results in ultraviolet radiation. Infrared radiation will be obtained in the transition from:

The radius of the first permitted Bohr orbit, for the electron, in a hydrogen atom equals 0.51 and its ground state energy equals -13.6eV If the electron in the hydrogen atom is replaced by muon (µ^-) [charge same as electron and mass energy will be, 207 m_e], the first Bohr radius and ground state

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

0.5

When an α-particle of mass 'm' moving with velocity 'v' bombards on a heavy nucleus of charge 'Ze', its distance of closest approach from the nucleus depends on m as:

What is the radius of iodine atom (At. no. 53, mass no. 126)

Hydrogen atom in ground state is excited by a monochromatic radiation of λ = 975 Å. Number of spectral lines in the resulting spectrum emitted will be

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