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.

Tags

NGSS.HS-PS1-8

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.

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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

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NGSS.HS-PS1-8

The most penetrating type of nuclear radiation is the alpha particle.

• True

• False

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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