How does bohrs model differ from todays?

Answer 1

Bohr's atomic model depicts the electron shells and orbitals as being two dimensional, staying the exact same distance away from the nucleus the entire time. Today, we know that electron orbits are three dimensional, and at best can only say where the electron in a given orbital is most likely to be at any given time, except for the f orbitals, as no one really knows for sure what those look like yet.

Answer 2

Bohr's model proposed fixed electron orbits around the nucleus, while today's model describes electron positions as probability clouds. Bohr's model also did not account for the concept of electron spin or the presence of sublevels within energy levels, both of which are crucial in today's understanding of atomic structure.