Atomic Theory

Front

What is the negatively charged particle found outside the nucleus?

Back

Electron

Front

Who provided evidence that an atom contains negatively charged particles?

Back

J.J. Thomson

Front

True or False: Some atoms are large enough to see with your eyes.

Back

False

Front

What scientist is best known for his 'Plum Pudding' model of the atom?

Back

J.J. Thomson

Front

Who was the first person to propose a theory about an atom?

Back

Democritus

Front

What is the smallest particle of matter?

Back

Atom

Front

What are the three main subatomic particles?

Back

Protons, Neutrons, Electrons

Front

What charge do protons carry?

Back

Positive charge

Front

What charge do neutrons carry?

Back

No charge (neutral)

Front

What is the nucleus of an atom composed of?

Back

Protons and Neutrons