10.2 lesson Radioactivity uses and dangers

Multiple Choice

Which type of radiation consists of single electrons?

• Alpha radiation

• Beta Radiation

• Gamma radiation

Multiple Choice

A sample of radioactive material with a half-life of 1 year has decayed to 12.5% of its original mass. How old is this sample?

• 1 year

• 2 years

• 3 years

• 4 years

Multiple Choice

The alpha radiation emited by smoke detectors consists of______

• electrons and protons

• neutrons and protons

• neutrons and electrons

• just electrons