The Bohr model of atoms

Options

A. assumes that the angular momentum of electrons is quantized .
B. uses Einstein's photoelectirc equation.
C. predicts continues emission spectra for atoms.
D. predicts the same emission spectra for all types of atoms.

Answer

A

Explanation

bohr made a hypothesis that there are certain special state of motin called stationary states, in which the electron may exist without radiating electromagnetic energy. In these states, according to bohr, the angular momentum of electrons takes values that are integer multiple of ħ. in stationary states, the angular momentum of the electron may have magnitude ħ,2ħ,3ħ....., but never such as 2.5ħ or 3.1ħ. this is called the quantization of angular momentum.