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

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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

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

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

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

0.5

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

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 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:

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:

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