THE DISTANCE BETWEEN 4th AND 3rd BOHR ORBITS OF He+ is ?

Answer 1

I didn't realize that someone was teaching Bohr's model anymore, little planets circling around the nucleus.

In the Bohr model, the "radius" of orbit in the n energy state is given by

radius= 5.92e-11 (n/Z) meters Z for He is 2, put in 4, 3 and subtract to get the "distance'. However, please dont think one can measure it as a real distance.