Radioactive Elements

Radioactive isotopes that can be

followed through the steps of a chemical

reaction or industrial process are called

• transformers

• tracers

• gamma rays

• reactants

Which statement is NOT true of

radioactive decay?

• It involves the nucleus of an atom.

• It involves radioactive isotopes.

• The identity of the atom remains the same.

• Fast moving particles and energy are

  released.

Tags

NGSS.HS-PS1-8

Alpha and beta decay are almost

always accompanied by

• gamma radiation

• an increase in atomic number

• a decrease in atomic number

• a catalyst

Tags

NGSS.HS-PS1-8

In relation to the original atom, the

atom that results from beta decay has an

atomic number that is

• 1 less

• 1 more

• 2 less

• the same

Tags

NGSS.HS-PS1-8

Uranium was the radioactive element studied by Becquerel and the Curies.

• True

• False

Tags

NGSS.HS-PS1-8

The most penetrating type of nuclear radiation is the

alpha particle.

• true

• false

Tags

NGSS.HS-PS1-8

The half-life of cobalt-60 is 5.26 years. After 10.52 years,

5 grams of a 20-gram sample will remain.

• true

• false

Tags

NGSS.HS-PS1-8

During radioactive decay, the identity of an atom remains

the same.

• true

• false

Tags

NGSS.HS-PS1-8

Alpha particles are fast-moving electrons given off during

radioactive decay.

• true

• false

Tags

NGSS.HS-PS1-8

Chemical reactions involve the protons and neutrons in the

nucleus of an atom.

• True

• False

Tags

NGSS.HS-PS1-8