Radioactive Decay and Half-Life

After the nucleus of a radioactive element undergoes changes, the element can transform into ...

•   (a)  a different isotope of the same element.

• (b) an entirely different element.

• Both (a) and (b)

• Neither (a) nor (b)

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NGSS.HS-PS1-8

For which of the following problems would a scientist most likely use carbon-14?

• to calculate the age of the Earth's oldest rocks

• to calculate the age of a piece of bone 

• to identify the elements that make up a rock 

• to identify the elements that make up a bone

Which of the following is NOT a reason to use Carbon-14 in dating a mastodont bone?

• C-14 decays at a predictable rate

• The mastodont bone is less than 50,000 years old

• C-14 is used to date recent organic remains

• C-14 is used in medical procedures

Identify the element formed when Carbon-14 undergoes radioactive decay.

• U-238

• N-14

• Ru-87

• C-14

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NGSS.HS-PS1-8

time taken for the number of undecayed nuclei to be reduced to half of its original value this is also known as

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NGSS.HS-PS1-8

If 10 mg of iodine 131 is given to a patient, how much is left after 24 days? The half-life of iodine-131 is 8 days.

• 25mg

• 25g

• 10g

• 10mg

What is the half-life of iodine-131?

• 32 days

• 8 days

• 16 days

• 24 days

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NGSS.HS-PS1-8

Which of the following are radioactive radiation?

• alpha, α

• theta, θ

• beta, β

• gamma, γ

• delta, δ

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NGSS.HS-PS1-8

Which of the following are radioactive radiation in the form of particle?

• alpha, α

• theta, θ

• beta, β

• gamma, γ

• delta, δ

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NGSS.HS-PS1-8

Which of the following are radioactive radiation in the form of radioactive ray?

• alpha, α

• theta, θ

• beta, β

• gamma, γ

• delta, δ

Tags

NGSS.HS-PS1-8