Fission and fusion notes

Multiple Choice

What is the main difference between nuclear fission and nuclear fusion?

• Fission splits atoms while fusion combines them

• Fission occurs in stars while fusion occurs on Earth

• Fission requires more energy than fusion

• Fusion releases radioactive waste while fission does not

Open Ended

How do fusion reactions in stars contribute to the existence of elements on Earth?

Multiple Choice

What is the Half life of this isotope?

• 5 seconds

• 10 seconds

• 15 seconds

• 20 seconds

Multiple Choice

A 50.0 g sample of a radioactive element has a half-life of 40 years. How much mass will be left after 80 years?

• 50

• 25

• 12.5

• 6.25