Atoms and Nucle...

Energy required for the electron excitation in Li²⁺ from the first to the third Bohr orbit is

When an electron jumps from the orbit a = 2 to n = 4, then wavelength of the radiations absorbed will be (R is Rydberg's constant)

The ratio of minimum wavelength of Lyman and Balmer series will be

In an inelastic collision, an electron excites a hydrogen atom from its ground state to a M–shell state. A second electron collides instantaneously with the excited hydrogen atom in the M–state and ionises it. At least how much energy the second electron transfers to the atom in the M-state?

According to the Bohr's atomic model, the relation between principal quantum number (n) and radius of orbit (r) is

The acceleration of electron in the first orbit of hydrogen atom is

An electron collides with a hydrogen atom in its ground state and excites it to n = 3. The energy given to hydrogen atom in this inelastic collision is (neglect the recoiling of hydrogen atom)

An electron of charge e moves with a constant speed v along a circle of radius r, its magnetic moment will be

An electron is moving in an orbit of a hydrogen atom from which there can be a maximum of six transition. An electron is moving in an orbit of another hydrogen atom from which there can be a maximum of three transition. The ratio of the velocities of the electron in these two orbits is

v₁ is the frequency of the series limit of Lyman series, v₂ is the frequency of the first line of Lyman series and v₃ is the frequency of the series limit of the Balmer series. Then,