Unit 9 Review: Nuclear Chemistry

After 4 half-lives, 1g of a sample of Krypton-85 remains unchanged.  What was the original mass of the sample?

• 16g
• 32g
• 0.0625g
• 4g

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NGSS.HS-PS1-8

The half-life of strontium-90 is 25 years. How much strontium-90 will remain after 100 years if the initial amount is 4.0 g?

• 3.0g
• 0.25mg
• 0.3g
• 0.25g

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NGSS.HS-PS1-8

The type of radioactive particle that can be stopped by a sheet of paper is the ____.

• alpha particle
• beta particle
• gamma ray
• uranium

Finish this equation

²⁰⁹₈₃Bi--> _{_______ +} ²⁰⁵₈₁Tl

• ⁴₂He

• ⁰_-1e

• y

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NGSS.HS-PS1-8

Identify the missing substance in each of the following nuclear reaction.

_____→¹³⁷₅₆ Ba + ⁰₋₁ e

• ¹³⁷₅₅Ba

• ¹³⁷₅₇La

• ¹³⁸₅₆Ba

• ¹³⁷₅₅Cs

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NGSS.HS-PS1-8

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

• alpha, beta, gamma

• X ray, beta, gamma

• alpha, gamma, beta

• X ray, gamma, beta

What is the symbol for an alpha particle?

• ⁴₂He
• ⁰_-1e
• ⁰₊₁ e
• ¹₀n

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NGSS.HS-PS1-8

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

• Fusion
• Fission
• Tracing
• Decay

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NGSS.HS-PS1-8

NGSS.HS-ESS1-1

This is an example of...

• Fission  reaction
• Fusion reaction
• Decomposition reaction
• Decay

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NGSS.HS-PS1-8

The splitting of a nucleus into smaller nuclei is

• fusion
• fission
• decay
• gamma radiation

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NGSS.HS-PS1-8