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?
Q.2.
Which of the following samples would have the greatest amount remaining afterdays?
Q.3.
Which sample would have the least amount remaining after 1 minute?
Q.4.
Which sample would have the greatest amount remaining after 1 minute?
Q.5.
How much time must pass for Hydrogen-3 to undergo 3 half-lives?
Q.6.
What is the half-life of Radon-222?
Q.7.
The half-life of a radioactive isotope is not effected by which of the following?
Q.8.
As a sample of Neon-undergoes radioactive decay, its half-life will
Q.9.
After the third half-life, how much of a radioactive sample is left?
Q.10.
Which isotope has a half-life ofyears?
Q.11.
What is the most penetrating radiation?
Q.12.
Which type of radiation can be stopped by a sheet of paper or clothing?
Q.13.
What is emitted during Gamma Radiation?
Q.14.
Like chemical reaction rates, nuclear decay rates vary with the conditions of reaction.
Q.15.
Radiation can cause what?
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?
Q.17.
If one haskg of Polonium and it undergoes two half-lives, how much do you have left?
Q.18.
The half life of an element isminutes.  What % of the element remains after an hour?
Q.19.
Uranium has two isotopes but only one of them is radioactive. Which one?
Q.20.
The radioactive isotope Nickel-has a half life ofyears. How much of agram sample remains afteryears?