Question

The total energy of the electron revolving around the nucleus is:

• A. zero
• B. less than zero
• C. more than zero
• D. in some atoms less than zero and in certain atoms more than zero

Answer 1

The correct option is B less than zero

Total Energy of Electron = (Potential energy) + (Kinetic energy)

Potential Energy of electron is negative due to the reaction between the nucleus and electron and have a greater magnitude than Kinetic energy.

While KE is always positive due to the presence of the square of velocity.

So, total Energy is -ve.

Hence, the correct option is $\text{B}$