Ch.4 Atomic Structure (Physical Science)

Front

What is the smallest particle of matter?

Back

An atom.

Front

What did J.J. Thomson's experiments reveal about atoms?

Back

Atoms contain negatively charged particles.

Front

What causes the glowing of a neon light?

Back

Electrons moving from higher to lower energy levels emit energy.

Front

What do elements combine to form?

Back

Compounds.

Front

What do scientists use to predict the locations of electrons in atoms?

Back

Probability.

Front

Who proposed that matter is composed of tiny, indivisible particles?

Back

Democritus.

Front

What is the charge of electrons?

Back

Negatively charged.

Front

What is the charge of protons?

Back

Positively charged.

Front

What is the nucleus of an atom composed of?

Back

Protons and neutrons.

Front

What is the term for the center of an atom?

Back

Nucleus.