Radioactive Elements

Radioactive isotopes that can be followed through the steps of a chemical reaction or industrial processes 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.

Alpha and beta decay are almost always accompanied by

• gamma radiation

• an increase in atomic number

• a decrease in atomic number

• a catalyst

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

Fill in the blank

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

• Uranium

• Curium

• Plutonium

• Barium

Fill in the blank

The most penetrating type of nuclear radiation is the _____________________________.

• alpha particle

• beta particle

• gamma ray

The particle that has 2 protons and 2 neutrons

• alpha particle

• beta particle

• gamma ray