Atomic History

Front

What is the smallest particle of an element that retains the chemical properties of that element?

Back

Atom

Front

List the scientists in order of their work related to atomic theory from earliest to most recent.

Back

Democritus, John Dalton, JJ Thomson, Ernest Rutherford, and Niels Bohr

Front

Which model of the atom proposed that atoms were positive spheres with negative electrons in them?

Back

Plum Pudding Model

Front

Who proposed the Plum Pudding Model?

Back

J.J. Thomson

Front

Who proposed that electrons move around the nucleus in shells?

Back

Niels Bohr

Front

What is the term for a positively charged particle found in the nucleus of an atom?

Back

Proton

Front

What is the term for a neutrally charged particle found in the nucleus of an atom?

Back

Neutron

Front

What is the term for a negatively charged particle that orbits the nucleus of an atom?

Back

Electron

Front

What is the atomic theory?

Back

A scientific theory that matter is composed of discrete units called atoms.

Front

What did John Dalton contribute to atomic theory?

Back

He proposed that all matter is made of atoms, which are indivisible and indestructible.