Front

Who discovered the electron?

Back

J J Thomson

Front

Uncertainty principle: A particle’s position, energy, and time can never be precisely known.

Back

Heisenberg

Front

Who created a model of the atom with electrons moving around the nucleus in fixed orbits? Options: Bohr, Dalton, Heisenberg, J J Thomson

Back

Bohr

Front

Who discovered the neutron?

Back

Chadwick

Front

Who conducted the gold foil experiment?

Back

Rutherford

Front

Who hypothesized that the atom was a tiny hard sphere?

Back

Dalton

Front

Who discovered that the atom is mostly empty space?

Back

Rutherford

Front

Who believed that atoms of a given element are identical? Options: JJ Thomson, Dalton, Democritus, Heisenberg

Back

Dalton

Front

Who created the atomic theory?

Back

Dalton

Front

Who used the cathode ray tube in his discovery?

Back

J J Thompson