Chem nuclear quiz
A radioactive isotope has a half-life of 2.5 years. Which fraction of the original mass remains unchanged after 10 years?
1/16
Given the reaction: 27/13 Al + 4/2 He —> X + 1/0n Which particle is represented by X?
30/15 P
Given the nuclear equation: 253/99 Es + X —> 1/0n + 256/101 Md, Which particle is represented by X?
4/2 He
Which particle has the least mass?
Beta particle
Which isotope is used to treat cancer?
Co-60
The ratio of the mass of U-238 to the mass of Pb-206 can be used to
Date geological formations
Which net change occurs in both nuclear fission and nuclear fusion reactions?
Mass is converted to energy
Given the equation represent a reaction: 235/92 U +1/0n —> 140/56 Ba + 93/36 Kr + 3 1/0 n + energy
Mass is lost due to the conversion of mass to energy
What evidence indicates that the nuclei of strontium-90 atoms are unstable?
Strontium-90 atoms spontaneously emit beta particles.
In which reaction is an atom of one element converted into an atom of another element?
Transmutation
A sample of which radioisotope emits particles having the greatest mass?
^220 Fr
What is a potential risk associated with radioactive isotopes?
biological exposure
Which radioisotope is used to determine the age of once-living organisms?
carbon-14
In which type of nuclear reaction do nuclei combine to form a nucleus with a greater mass?
fusion
Which nuclear emission has the greatest penetrating power?
gamma radiation
