Question

The total energy of an electron in an atom in an orbit is $-3.4\,eV$ . Its kinetic and potential energies arc, respectively:

• A. 3.4 eV, -6.8 eV
• B. 3.4 eV. 3.4 eV
• C. -3.4 eV, - 3.4 eV
• D. -3.4 eV, -6.8 eV

Answer 1

Answer: (A)

3.4 eV, -6.8 eV

Answer 2

In Bohr's model of H atom $\therefore K.E. =\left|TE\right| = \frac{\left|U\right|}{2}$ $\therefore K.E . = 3.4 eV$ $U = -6 .8 eV$