Atomic Structure Questions

One mole of an ideal diatomic gas undergoes a transition from A to B along a path AB as shown in the figure, The change in internal energy of the gas during the transition is :...

Consider 3rd orbit of He+ (Helium), using non-relativistic approach, the speed of electron in this orbit will be [given K = 9 × 109 constant, Z = 2 and h (Planck)′s Constant) = 6.6 × 1...

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

When an α-particle of mass ‘m’ moving with velocity ‘v’ bombards on a heavy nucleus of charge ‘Ze’, itsdistance of closest approach from the nucleus depends o...

Given the value of Rydberg constant is 107 m-1, the wave number of the last line of the Balmer series in hydrogen spectrum will be:

An electron from various excited states of hydrogen atom emit radiation to come to the ground state. Let λn, λg be the de Broglie wavelength of the electron in the nth state and the gro...

If the series limit frequency of the Lyman series is vL, then the series limit frequency of the Pfund series is :

The volume (V) of a monatomic gas varies with its temperature (T), as shown in the graph. The ratio of work done by the gas, to the heat absorbed by it, when it undergoes a change from state A to stat...

One mole of a monatomic ideal gas undergoes a cyclic process as shown in the figure (whre V is the volume and T is the temperature). Which of the statements below is (are) true ?...

Ratio of longest wavelengths corresponding to Lyman and Balmer series in hydrogen spectrum is:-

Match List-I (Electromagnetic wave type) with List - II (Its association/application) and select the correct option from the choices given below the lists :...

Hydrogen (1H1), Deuterium (1H2) singly ionised Helium (2He4)+ and doubly ionised lithium (3Li6)++; all have one electron around the nucleus. Consider an electron transition from n = 2 to n = 1. If the...

The radius of the orbit of an electron in a Hydrogen-like atom is 4.5 a0, where a0 is the Bohr radius. Its orbital angular momentum is It is given that h is Planck constant and R is Rydberg constant. ...

The wavelength of the first spectral line in the Balmer series of hydrogen atom is 6561 The wavelength of the second spectral line in the Balmer series of singly-ionized helium atom is...

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

An alpha particles of energy 5 MeV is scattered through 180o by a fixed uranium nucleus. The distance of the closest approach is of the order of

If elements which principle quantum number n > 4 were not allowed in nature, the number of possible elements would be

Consider the spectral line resulting from the transistion n = 2 → n = 1 in the atoms and ions given below. The shortest wavelength is produced by

Two identical p-n junctions may be connected in series with a battery in three ways. The potential drops across the two p-n junctions are equal in...

As per Bohr's model, the minimum energy (in eV) required to remove an electron from the ground state of doubly ionized Li atom ($Z = 3$) is: