Question

Justify: "The energy of an electron is quan- tized".

Answer 1

Orbits or Energy levels:

1. The negatively charged electrons revolve around the nucleus in fixed, definite circular paths called orbits.
2. Each orbit has a fixed value of energy.

"The energy of an electron is quan- tized":

1. The energy of an electron revolving in a particular orbit is fixed and does not change with time.
2. As the electrons revolve around the orbits of fixed energy values, the electrons in the atom can have only specific definite or discrete energy values.
3. If we want to move the electron to higher level, we need to give particular amount of energy and it releases same amount of energy while coming to original orbit.
4. Hence, the energy of an electron is quantized.