Unit 1 Part 1 Review

Front

What is an ion?

Back

An ion is an atom that has lost or gained electrons, resulting in a net charge.

Front

What happens to the atomic number of an element during gamma decay?

Back

The atomic number remains the same.

Front

Can the number of protons in an atom change?

Back

No, each atom has a unique number of protons that does not change.

Front

What charge do electrons carry?

Back

Electrons are negatively charged particles.

Front

After three half-lives, what fraction of a radioactive sample remains?

Back

1/8 of the sample remains.

Front

What is the definition of half-life?

Back

Half-life is the time required for half of a sample of a radioactive substance to decay.

Front

What is the relationship between protons and atomic number?

Back

The atomic number of an element is equal to the number of protons in its nucleus.

Front

What is nuclear decay?

Back

Nuclear decay is the process by which an unstable atomic nucleus loses energy by emitting radiation.

Front

What are gamma rays?

Back

Gamma rays are high-energy electromagnetic waves emitted during nuclear decay.

Front

What is the charge of a proton?

Back

Protons carry a positive charge.