Unit 8 Review (ESL Physical Science)

Front

What is nuclear fusion?

Back

Nuclear fusion is the process where two low-mass nuclei combine to form a larger nucleus, releasing energy.

Front

What charge does an atom have when it gains electrons?

Back

An atom has a negative charge when it gains electrons.

Front

What are the physical properties of a metalloid?

Back

Metalloids are malleable, do not conduct electricity well, and typically lack luster.

Front

What is half-life?

Back

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

Front

How much iodine-131 is left after 16 days if 20 mg is given and its half-life is 8 days?

Back

5 mg of iodine-131 is left after 16 days.

Front

What is beta decay?

Back

Beta decay is a type of radioactive decay where a beta particle (electron or positron) is emitted from an atomic nucleus.

Front

What is nuclear fission?

Back

Nuclear fission is the process of splitting a large nucleus into smaller nuclei, accompanied by the release of energy.

Front

What is the difference between metals and nonmetals?

Back

Metals are typically shiny, malleable, and good conductors of heat and electricity, while nonmetals are dull, brittle, and poor conductors.

Front

What is a radioactive isotope?

Back

A radioactive isotope is an atom with an unstable nucleus that decays over time, emitting radiation.

Front

What is gamma decay?

Back

Gamma decay is a type of radioactive decay that involves the emission of gamma rays from a nucleus.