2-1 Part 3 Review

Front

What does the nucleus of an atom contain?

Back

The nucleus of an atom contains protons and neutrons.

Front

When is a nucleus considered STABLE?

Back

A nucleus is considered STABLE when the number of protons and neutrons are the same.

Front

What happens to an atom when its nucleus is unstable?

Back

The atom shakes or wiggles when the nucleus is unstable.

Front

What is the ratio of protons to neutrons in a stable nucleus?

Back

The ratio of protons to neutrons in a stable nucleus is 1:1.

Front

Why is this nucleus considered STABLE?

Back

This nucleus is considered STABLE because there are equal numbers of neutrons and protons.

Front

Define protons.

Back

Protons are positively charged particles found in the nucleus of an atom.

Front

Define neutrons.

Back

Neutrons are neutral particles found in the nucleus of an atom.

Front

What is the charge of an electron?

Back

Electrons have a negative charge.

Front

What is the role of neutrons in the nucleus?

Back

Neutrons help stabilize the nucleus by offsetting the repulsive forces between protons.

Front

What occurs during radioactive decay?

Back

During radioactive decay, an unstable nucleus loses energy by emitting radiation.