Assertion (A): When the electron of a hydrogen atom jumps from the $n = 1$ orbit to the $n = 2$ orbit, its kinetic energy falls to one quarter of the old value, and the total energy of the atom increases by $10.2\ \text{eV}$. Reason (R): In every Bohr orbit, the kinetic energy of the electron is equal to the total energy of the atom, and it is negative.