Atomic Theory

Front

Who came up with the first atomic theory?

Back

Dalton

Front

What did Rutherford discover about atoms?

Back

An atom is mostly empty space, but has a dense positively charged center (nucleus).

Front

What is a positively charged particle?

Back

proton

Front

What is a negatively charged particle?

Back

electron

Front

What is a particle with no charge?

Back

neutron

Front

Who discovered the electron?

Back

Thomson

Front

What did Rutherford discover in his experiment?

Back

nucleus

Front

Who proposed a model with electrons moving in specific layers?

Back

Bohr

Front

Rutherford's "gold-foil" experiment using alpha particle scattering concluded that

Back

most of the atom is empty

Front

A tiny but very dense, positively charged portion of the atom that holds most of the atomic mass

Back

Nucleus