NGSS.HS-PS1-8

Most of the mass in an atom is concentrated in the...

• electrons
• nucleus
• protons
• empty space

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NGSS.HS-PS1-8

What is the half-life of an isotope if after 20.0 days you have 4.0 grams remaining of a 64.0 grams sample?

• 1.25 days
• 5.0 days
• 0.000305 days
• 4.25 days

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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

Different isotopes have...

• different masses

• different protons

• different electrons

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NGSS.HS-PS1-8

If there is 6.25% of carbon-14 remaining in a coral sample, how old is it?

• 5,730 years

• 11,460 years

• 16,110 years

• 22,920 years

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NGSS.HS-PS1-8

Define Radon-222

• Considered a man-made outdoor air pollutant

• Naturally occurring radioactive gas produced by decay of uranium found in rocks

• Radon gas cannot infiltrate homes as it can never escape from rocks

• Radon gas does not lead to any human health complications

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NGSS.HS-PS1-8

We use the energy stored in the nucleus of an atom by converting it to ______________, which can then be used to generate electricity.

• potential energy

• thermal energy

• mechanical energy

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NGSS.HS-PS1-8

How many neutrons does this isotope have?

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NGSS.HS-PS1-8

Nuclear energy is when one neutron hits a Uranium-235 atom and causes it to split apart releasing energy.

This process is called nuclear _________.

• Fission

• Fusion

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NGSS.HS-PS1-8

Using ESRT (A) [Radioactive Decay Data], what is the half-life in standard notation of carbon-14?

• 5,700 years
• 57,000 years
• 570,000 years
• 5,700,000 years

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NGSS.HS-PS1-8