# Recent questions and answers in Relations and Functions

Questions from: Relations and Functions

### In the ground state of hydrogen atom, its Bohr radius is given as $5.3 \times 10^{-11}\;m$ . The atom is excited such that the radius becomes $21.2 \times 10^{-11}\;m$ . Find (i) the value of the principal quantum number and (ii) the total energy of the atom in this excited state.

To see more, click for all the questions in this category.