The correct set of four quantum numbers for the valence electron of rubidium atom (Z = 37) is

The conclusion that every additional electron enters the orbital with lowest possible energy has been drawn from

Bohr’s model of atom is not in agreement with

In the atomic spectrum of hydrogen, the spectral lines pertaining to electronic transition of n = 4 to n = 2 refers to

If ionising energy of H atom is 13.6 eV, then the second ionising energy of He should be

The correct electronic configuration of Cr (Z=24) is

The maximum number of electrons in s, p and d-subshells are

The maximum number of electrons that can be accommodated in d_xy orbital is

Which d-orbital does not have four lobes?

Which shape is associated with the orbital designated by n=2, l=1

If the value of azimuthal quantum number of an electron is 2, then which of the following values of magnetic quantum numbers is not permissible

If r is the radius of first orbit, the radius of n^th orbit of the H atom will be

For which of the following sets of quantum numbers an electron will have the highest energy?

The total number of orbitals in a shell with principal quantum number ‘n’ is

Which of the following expressions gives the de-Brogiie relationship ?

Rutherford’s atomic model suggests the existence of

Which of the above is violation of Pauli’s exclusion principle ?

If the nitrogen atom had electronic configuration 1s⁷ , it would have energy lower than that of the normal ground state configuration 1s² 2s² 2p³ because the electrons would be closer to the nucleus.

Yet, 1s⁷ is not observed because it violates.

Radial nodes present in 3s and 2p -orbitals are respectively

. Rutherford’s experiment, which established the nuclear model of the atom, used a beam of

identify the person

The Nobel Prize in Physics 1921 was awarded to Albert Einstein "for his services to Theoretical Physics, and especially for his discovery of the law of

It is the diagram of

Violet light has graeter ________ than red light ?

1s², 2s², 2p³ represents

1s & 2s orbitals have similar

For each metal, there is a characteristic minimum frequency,below which photoelectric effect is not observed. This is called

In which case ejection of photoelectron is the easiest?

"It is impossible to determine simultaneously, the exact

position and exact momentum (or velocity) of an electron." This is the statement of

ns-orbital has ___________nodes,

This is the boundary surface diagram of

The orbitals having the same energy are called

Which subatomic particle is the heaviest?

The correct electronic configuration of Pd is

Millikan's oil drop experiment could find:

The two electrons occupying the same orbital are distinguished by

The total number of atomic orbitals in 4^th energy level of an atom is

₆₄Gd has the configuration

For which one of the following Bohr's Model is NOT valid ?