Question

The total energy of an electron in an atom in an orbit is -3.4 eV. Its kinetic and potential energies are, respectively ______.

विकल्प

• 3.4 eV, -6.8 eV

• 3.4 eV, 3.4 eV

• -3.4 eV, -3.4 eV

• -3.4 eV, -6.8 eV

Answer 1

The total energy of an electron in an atom in an orbit is -3.4 eV. Its kinetic and potential energies are, respectively 3.4 eV, -6.8 eV.

Explanation:

T.E. = - K.E.

Also, P.E. = - 2 K.E.

∴ K.E. = + 3.4 eV

and P.E. = - 2 `xx` (+ 3.4) = - 6.8 eV