Question

Assertion : The total energy of an electron revolving in any stationary orbit is negative.
Reason : Energy can have positive or negative values.

• A. If both assertion and reason are true and reason is the correct explanation of assertion
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false
• D. If both assertion and reason are false

Answer 1

Answer: (B)

Energy can have positive or negative values. In the atom the electrons are bound. The negative energy of the revolving electrons does not allow the electrons to leave the atom. That the electrons are bound within the atom is indicated by the energy being negative.