radioactive decay

How long does it take a 180-gram of gold-198 to decay to 22.5 grams if the half -life of gold-198 is 2.68 days?

• 8.04 days

• 3 days

• 4 days

• 2.68 days

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NGSS.HS-PS1-8

How long will it take for a 28-gram sample of radon-222 to decay to 3.5 grams? the half-life of radon-222 of 3.82 days

• 15.28 days

• 11.46 days

• 3 days

• 4 days

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NGSS.HS-PS1-8

How long will it take for a 150-gram sample of Nitrogen-16 tp decay to 18.75 grams if the half-life for Nitrogen -16 is 7.2 seconds

• 7.2 seconds

• 14.4 seconds

• 18.75 seconds

• 21.6 seconds

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NGSS.HS-PS1-8

How long will it for a take for a 40 gram. The half-life of cobalt-60 is 5.26 years sample ofcobalt-60 to decay to 5 grams?

• 17.75 days

• 15.78 years

• 15.15 years

• 17.17 years

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NGSS.HS-PS1-8

In the equation, ¹⁴₆C --> ¹⁴₇N + ⁰_-1B, the _______ decay of radioactive carbon-14 results in the creation of a new nitrogen-14 atom.

• Gamma

• Beta

• Alpha

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NGSS.HS-PS1-8

Uranium-238  decays into  Thorium-234  by emitting .........

• an alpha particle
• a beta particle
• gamma rays
• visible light

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NGSS.HS-PS1-8

If we start off with element ₂₄X⁵⁰ after an alpha decay we get another element Y that looks like

• ₂₂Y⁵⁰
• ₂₂Y⁴⁶
• ₂₀Y⁴⁸
• ₂₆Y⁵⁴

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NGSS.HS-PS1-8

The nucleus is held together by the ___________________________force.

• The Strong Nuclear Force

• The Weak Nuclear Force

• Electromagnetism

• Gravity

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NGSS.HS-PS1-8

Has the highest penetrating power.  Can penetrate our body.  Even several cm thick of lead or several meters thick of concrete cannot stop all of it.

• Alpha
• Beta
• Gamma

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NGSS.HS-PS4-4

²⁴⁰₉₄Pu —› ____ + ⁴₂He

• ²³⁶₉₂U

• ²⁴⁷₉₆Cm

• ²⁴⁴₉₃Np

• ²⁴²₉₅Am

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NGSS.HS-PS1-8