History of the Atom

Front

What is the smallest part of an atom?

Back

Electron.

Front

Who discovered the electron?

Back

Thomson.

Front

Which part of the atom is the smallest: proton, electron cloud, or nucleus?

Back

Proton.

Front

What is the center of an atom called?

Back

Nucleus.

Front

What is a particle with one positive charge called?

Back

Proton.

Front

What are the three main parts of an atom?

Back

Protons, neutrons, and electrons.

Front

What charge does an electron have?

Back

Negative charge.

Front

What charge does a neutron have?

Back

No charge (neutral).

Front

What is the mass of a proton compared to an electron?

Back

Proton is much heavier than an electron.

Front

What is the role of the nucleus in an atom?

Back

It contains protons and neutrons and is the center of the atom.