Bohr model of atom is contradicted by

Bohr's model of an atom is contradicted by Heisenberg's uncertainty principle.

 According to Bohr's model, an electron in an atom is located at a definite distance from the nucleus and is revolving with a definite velocity around it. 

According to Heisenberg's uncertainty principle, it is impossible to determine simultaneously the exact position and momentum (or velocity) of the electron.