Unit 6 Pop Quiz

What is your first and last name?

The half-life of U-231 is 60 seconds. If one had 1000 g at the beginning, how many grams would be left after 4 minutes has elapsed?

• 62.5 g

• 125 g

• 250 g

• 500 g

The half-life of Zn-71 is 2.4 minutes. If one had 100.0 g at the beginning, how many grams would be left after 7.2 minutes has elapsed?

• 100 g

• 50 g

• 25 g

• 12.5 g

Nuclear _______ is the combining of multiple nuclei to form a heavier nucleus.

Nuclear _______ is a reaction in which an atomic nucleus of a radioactive element splits by bombardment from an external source, with simultaneous release of large amounts of energy, used for electric power generation.

An unstable isotope is said to be _________.

• Radioactive
• Transmutated
• Large
• Dangerous

Which types of radiation cause transmutations?

• Alpha
• Beta
• Gamma
• X-Rays

Nuclear fusion and nuclear fission reactions both release _______.

Which of the following is a danger of nuclear fission?

• Creates too much energy to harness
• It creates nuclear waste
• It causes mutations
• It uses scarce fuel

After what atomic number are all isotopes unstable?

• 83
• 89
• 86
• 104