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SAT® Subject Test in Physics

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Bohr Assumptions

SATPHY-TGCK4D

Which of the following assumptions made by Neils Bohr regarding the hydrogen atom was NOT new and "radical"?

A

Electrons are only stable in certain orbits.

B

Atoms only emit electromagnetic radiation when electrons transition to lower energy states.

C

The Coulomb force is responsible for keeping the electron in orbit around the positive nucleus.

D

An electron in a hydrogen atom can only orbit the nucleus if its angular momentum is some integer multiple of "h bar."

E

All of the above were new and "radical."