PSH Ch 20 Radioactivity Review

Background radiation can come from

• the sun.

• plants.

• water.

• All of the above

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NGSS.HS-PS4-3

A helium nucleus with two protons and two neutrons is called a(n) ____.

• alpha particle

• beta particle

• electroscope

• gamma ray

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NGSS.HS-PS1-8

Unstable nuclei can break apart spontaneously, changing the identity of the ____.

• elements

• atoms

• compounds

• reactions

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NGSS.HS-PS1-8

If a source of radiation is placed near ____ cells, atoms in the cells can be ionized and can die or stop growing.

• thyroid

• fat

• heart

• cancer

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NGSS.HS-PS1-8

Two or more nuclei combine to form one larger nucleus in the process of nuclear ____.

• decay

• fission

• fusion

• tracing

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NGSS.HS-PS1-8

A(n) ____ is a high energy electron.

• beta particle

• helium nucleus

• alpha particle

• positron

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Alpha particles have a ____ charge.

• -1

• 0

• +1

• +2

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NGSS.HS-PS1-8

When one large nucleus is split into two smaller nuclei, the process is nuclear ____.

• decay

• fission

• fusion

• tracing

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The three types of nuclear radiation in increasing order of penetrating power are ____.

• alpha, beta, gamma

• alpha, gamma, beta

• X ray, beta, gamma

• X ray, gamma, beta

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NGSS.HS-PS1-8

How much hydrogen-3 will remain after 60 years if the original sample had a mass of 80.0 g and the half-life of hydrogen-3 is 12 years?

• 1.25 g

• 2.50 g

• 5.00 g

• 10.0 g

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NGSS.HS-PS1-8