Radioactivity & Half-Life (Test Review)

Front

What makes something radioactive?

Back

An unstable nucleus.

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NGSS.HS-PS1-8

Front

What is the half-life of a radioactive element?

Back

The time it takes for half of a radioactive sample to decay.

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NGSS.HS-PS1-8

Front

If a radioactive sample has a half-life of 2 years, how much of the sample is left after 6 years?

Back

1/8 of the sample is left.

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NGSS.HS-PS1-8

Front

What is the term for the rate at which a radioactive element decays?

Back

Half-life.

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NGSS.HS-PS1-8

Front

Who was the first woman to win a Nobel Prize?

Back

Marie Curie.

Front

If a sample of Radium-228 decays from 100g to 12.5g, how many half-lives did it experience?

Back

3 half-lives.

Tags

NGSS.HS-PS1-8

Front

What is radioactivity?

Back

The process by which unstable atomic nuclei lose energy by emitting radiation.

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NGSS.HS-PS1-8

Front

What are the three types of radiation emitted by radioactive materials?

Back

Alpha particles, beta particles, and gamma rays.

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NGSS.HS-PS1-8

Front

What is an alpha particle?

Back

A type of radiation consisting of 2 protons and 2 neutrons.

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NGSS.HS-PS1-8

Front

What is a beta particle?

Back

A high-energy, high-speed electron or positron emitted by certain types of radioactive nuclei.

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NGSS.HS-PS1-8