Radioactive Decay Quiz

What is the half-life of iodine-131?

• 5 days

• 15 days

• 8 days

• 11 days

What is the half-life of carbon-14?

• 573000 years

• 57300 years

• 5730 years

• 573 years

What is the half-life of strontium-90?

• 29 years

• 39 years

• 49 years

• 59 years

What is the source of radioactive potassium-40 in our bodies?

• Bananas

• Apples

• Air

• Water

What is the limit to the reliability of radiocarbon dating?

• 5000 years

• 1000 years

• 55000 years

• 10000 years