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