Radioactivity and Half-Life Quiz

What is the process by which an unstable atomic nucleus loses energy by emitting radiation?

• electron capture

• radioactive decay

• nuclear fusion

• alpha decay

Tags

NGSS.HS-PS1-8

Which type of radioactive decay involves the emission of an alpha particle?

• Beta decay

• Gamma decay

• Neutron decay

• Alpha decay

Tags

NGSS.HS-PS1-8

What is the symbol for an alpha particle?

• C

• B

• A

• α

Which type of radioactive decay involves the emission of a beta particle?

• Beta decay

• Neutron decay

• Gamma decay

• Alpha decay

Tags

NGSS.HS-PS1-8

What is the symbol for a beta particle?

• B

• Β

• b

• β

Tags

NGSS.HS-PS1-8

What is the half-life of a radioactive substance?

• The half-life of a radioactive substance is the time it takes for half of the substance to decay or transform into another element or isotope.

• The half-life of a radioactive substance is the time it takes for the substance to completely decay or transform into another element or isotope.

• The half-life of a radioactive substance is the time it takes for one-fourth of the substance to decay or transform into another element or isotope.

• The half-life of a radioactive substance is the time it takes for the substance to double in size or quantity.

Tags

NGSS.HS-PS1-8

What is the formula to calculate the remaining amount of a radioactive substance after a certain number of half-lives?

• Remaining Amount = Initial Amount * (1/2)^(Number of Half-Lives) + 1

• Remaining Amount = Initial Amount * (1/2)^(Number of Half-Lives)

• Remaining Amount = Initial Amount * (1/2)^(Number of Half-Lives) - 1

• Remaining Amount = Initial Amount * (1/2)^(Number of Half-Lives) * 2

Tags

NGSS.HS-PS1-8

A sample of a radioactive substance has a half-life of 10 days. If the initial amount of the substance is 100 grams, how much will remain after 30 days?

• 75 grams

• 50 grams

• 12.5 grams

• 25 grams

Tags

NGSS.HS-PS1-8

What is the nuclear decay equation for the alpha decay of uranium-238?

• Uranium-238 -> Thorium-234 + Helium-4

• Uranium-238 -> Plutonium-239 + Helium-4

• Uranium-238 -> Lead-206 + Helium-4

• Uranium-238 -> Radium-226 + Helium-4

Tags

NGSS.HS-PS1-8

What is the process by which a nucleus with too many protons or neutrons becomes stable?

• electron capture

• radioactive decay

• nuclear fusion

• beta decay

Tags

NGSS.HS-PS1-8