If the energy of the electron in the 1^st orbit of hydrogen is -13.6 eV, then how much is the energy (in eV) in the 2^nd orbit?

Concept-

• The atoms have protons and neutrons in the nucleous of the atom and electrons revolve around the nucleous in the orbits.
• For each orbits there is a certain amount of energy for the electrons.

The energy of electrons in any orbit is given by:

Where n is principle quantum number and Z is atomic number

Explanation-

For hydrogen atom:

Atomic number (Z) = 1

Second orbit, n = 2