Question

he correct expression derived for the energy of an electron in the energy level is for H-atom:​

Answer 1

$\huge\mathfrak{Answer:-}$

⭕ The total energy of an electron in an orbit is equal to the sum of kinetic energy and potential energy.

⭕ Energy of an electron increases with increase in number of orbits and it becomes zero in infinite orbit.

⭕ Now, if an electron comes to some finite orbit, its energy decreases from zero and hence must have negative value.

⭕ Therefore, En < 0 = Negative value.

⭕ Refer to the above attachment for the derivation of the expression.⭐

$\huge\mathfrak{Thank you :)}$