Which of the following was not a contribution by Niels Bohr?

Electrons are in orbits.
There is a relationship between the outer shell and chemical properties.
The charge of an electron.
Quantum energy emissions.

Question

Which of the following was not a contribution by Niels Bohr?

Electrons are in orbits.
There is a relationship between the outer shell and chemical properties.
The charge of an electron.
Quantum energy emissions.

Divergent0997 · Answer

The charge on electrons was determined by the Robert Millikan and Harvy Fletcher from their experiment named Oil drop experiment. Whereas Neil Bohr in his structure of atom explained that: Electrons are moving around the nucleus in a discrete circular paths known as orbits or shells