According to Bohr's theory, the formula of atomic energy level is en = e1/N2 =-13.6 ev/N2.
From the outer orbit to the inner orbit, the quantum number decreases from large to small, so the energy of atoms decreases.
The reduced energy of atoms radiates in the form of photons.
Because the coulomb force of the nucleus to the electron is the centripetal force of the electron moving around the nucleus at a uniform speed.
According to Newton's second law of motion, Coulomb's law and centripetal acceleration's formula, there are: ke 2/rn 2 = mv 2/rn,
According to the orbital formula of Bohr theory: Rn = N 2R 1.
According to the above formula, the kinetic energy of an electron in orbit is ek =1/2mv2 = ke2/(2n2 * r1).
So when the orbital quantum number decreases, the kinetic energy of electrons increases.
Therefore:
The energy of atoms decreases and the kinetic energy of electrons increases.