Q.1
If 1/4 of a sample of Hydrogen-2 remains unchanged after 4.minutes.  How long is the half-life of Hydrogen-2?
  • 4.60 min
  • 2.30 min
  • 1.15 min
  • 0.58 min
Q.2
Which of the following samples would have the greatest amount remaining afterdays?
  • 5g of Au-198
  • 10g of I-131
  • 5g of P-32
  • 10g of Rn-222
Q.3
Which sample would have the least amount remaining after 1 minute?
  • 100g of Francium-220
  • 100g of Potassium-37
  • 100g of Neon-19
  • 100g of Nitrogen-16
Q.4
Which sample would have the greatest amount remaining after 1 minute?
  • 100g of Francium-220
  • 100g of Potassium-37
  • 100g of Neon-19
  • 100g of Nitrogen-16
Q.5
How much time must pass for Hydrogen-3 to undergo 3 half-lives?
  • 12.31 years
  • 36.93 years
  • 4.10 years
  • 3.00 years
Q.6
What is the half-life of Radon-222?
  • 1599 years
  • 27.4 seconds
  • 3.823 days
  • 12.36 hours
Q.7
The half-life of a radioactive isotope is not effected by which of the following?
  • Temperature
  • Pressure
  • Concentration
  • None of these will effect the rate of a nuclear reaction
Q.8
As a sample of Neon-undergoes radioactive decay, its half-life will
  • decrease
  • increase
  • remain the same
  • start over
Q.9
After the third half-life, how much of a radioactive sample is left?
  • 1/2
  • 1/3
  • 1/16
  • 1/8
Q.10
Which isotope has a half-life ofyears?
  • Carbon-12
  • Cobalt-60
  • Carbon-14
  • Cesium-137
Q.11
What is the most penetrating radiation?
  • gamma
  • alpha
  • beta
  • positron
Q.12
Which type of radiation can be stopped by a sheet of paper or clothing?
  • Alpha
  • Beta
  • Gamma
Q.13
What is emitted during Gamma Radiation?
  • Particles.
  • Protons
  • Beta Rays.
  • Gamma Rays.
Q.14
Like chemical reaction rates, nuclear decay rates vary with the conditions of reaction.
  • True
  • False
Q.15
Radiation can cause what?
  • Superpowers
  • Cancer
  • Headaches
  • The flu
Q.16
Which type of radiation penetrates paper and skin, or a thin sheet of metal, but can be stopped by a sheet of lead, or thick concrete?
  • Alpha
  • Beta
  • Gamma
Q.17
If one haskg of Polonium and it undergoes two half-lives, how much do you have left?
  • 12 kg
  • 3 kg
  • 6 kg
Q.18
The half life of an element isminutes.  What % of the element remains after an hour?
  • 0%
  • 12.5%
  • 20%
  • 25%
Q.19
Uranium has two isotopes but only one of them is radioactive. Which one?
  • U-235
  • U-238
Q.20
The radioactive isotope Nickel-has a half life ofyears. How much of agram sample remains afteryears?
  • 1 gram
  • 1.25 grams
  • 0.50 grams
  • 0.075 grams
0 h : 0 m : 1 s