Answer:
d. at ground state
Explanation:
Electrons in the Bohr's model of the atom are at the lowest possible energy state when they are their ground state.
The lowest energy state available to an electron is the ground state.
- According to the the Bohr's model of the atom, the extranuclear part is made up of electrons in specific spherical orbits around the nucleus.
- In the excited state, the level is higher than the ground state.
- When electrons changes state they either absorb or gain energy.
