Half life practice problems

Front

What is released when nuclei decay?

Back

Energy

Front

What particle does Uranium-238 emit when it decays into Thorium-234?

Back

An alpha particle

Front

True or False: Gamma rays damage human cells/tissue.

Back

True

Front

If the half-life of Zn-71 is 2.4 minutes, how many grams are left from 100.0 g after 7.2 minutes?

Back

12.5 g

Front

How many protons does a U-235 atom have?

Back

92

Front

What is half-life?

Back

The time required for half of the radioactive atoms in a sample to decay.

Front

What is the half-life of a substance that decays from 80 g to 20 g in 12 hours?

Back

12 hours

Front

What type of radiation is emitted during beta decay?

Back

Beta particles

Front

What is the main difference between alpha and beta decay?

Back

Alpha decay emits alpha particles, while beta decay emits beta particles.

Front

What happens to the mass number during alpha decay?

Back

It decreases by 4.