Chemistry Benchmark Review

Unstable atomic nuclei have an imbalance of

• Protons and electrons

• Electrons and neutrons

• Neutrons and electrons

• Protons and neutrons

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Where does most of the radiation we encounter come from?

• Tanning beds

• Cosmic rays from other planets

• Cosmic rays from the sun and the stars

• Only the stars

Alpha particle

• Carries a negative electric charge

• Carries a positive electric charge

• Is a non-visible high energy light wave

• Is two electrons stuck together

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A Beta particle

• Carries a negative electric charge

• Carries a positive electric charge

• Is a non-visible high energy light wave

• Carries no charge at all

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A gamma ray

• Carries a negative electric charge

• Carries a positive electric charge

• Is a non-visible high energy light wave

• Is two electrons stuck together

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When an element ejects an alpha particle the atomic number of the resulting element

• Reduces by 2

• Reduces by 4

• Increases by 2

• Increases by 4

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Determine the number of protons and neutrons of Radon-200

• P-100, N-100

• P- 86, N-114

• P-2, N-00

• P-86, N-200

Platinum-182 has a half-life of 3 minutes. How many grams of a 120 gram sample will be left after 3 half-lives?

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NGSS.HS-PS1-8

Which of the following can be classified as matter?

• water

• sand

• perfume

• ice cream

• all of the above

Chemistry is the study of

• matter.

• transformations of matter.

• only microscopic phenomena.

• only macroscopic phenomena.

• both A and B

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