Question

The energy of electrons in the same subshell is _____.
(A) Different
(B) Zero
(C) Infinite
(D) Same

Answer 1

Hint: We know that an atom consists of a nucleus which contains protons,neutrons and electrons. The electrons are small negatively charged particles that move in an orbit around the nucleus. The electrons revolve around the nucleus in the orbitals.

Complete Answer :
- We know that an atom consists of electrons. The electrons are small negatively charged particles that move in an orbit around the nucleus. The electrons revolve around the nucleus.
- The electrons do not move freely at any random position. The revolution of electrons is restricted in a particular orbit according to their energy levels.
- We know that the fixed distances of electrons from the nucleus of an atom are known as energy levels. An electron moves from one energy level to the other energy level but the electron does not stay between two energy levels.
- Every orbital is made up of many subshells. The subshell to which the electron belongs is given by the Azimuthal quantum number. The Azimuthal quantum number is denoted by ‘l’.
- The electrons that belong to the same subshell have the same value of Azimuthal quantum number. As the value of Azimuthal quantum numbers is the same, the energies of the electrons in the same subshell are the same. Thus, the energy of the electron in the same subshell is the same.

Thus, the correct option is (D) the same.

Note: The subshell is a group of orbitals. There are four subshells s, p, d and f. The azimuthal quantum number indicates the subshell. If the azimuthal quantum number is 0 then the electron belongs to the subshell s. If the azimuthal quantum number is 1 then the electron belongs to the subshell p. If the azimuthal quantum number is 2 then the electron belongs to the subshell d. If the azimuthal quantum number is 3 then the electron belongs to the subshell f.