Radioactive Decay Classwork

Which nuclear reaction is classified as alpha decay?

• 14C → 14N + 0e

• 42K → 42Ca + 0e

• 226Ra → 222Rn + 4He

• 3H → 0e + 3He

Gamma rays are emanations that have

• mass but no charge

• neither mass nor charge

• charge but no mass

• both mass and charge

Which type of emission has the highest penetrating power?

• alpha

• positron

• beta

• gamma

Which list of particles is in order of increasing mass?

• proton → electron → alpha particle

• proton → alpha particle → electron

• electron → proton → alpha particle

• alpha particle → electron → proton

The diagram represents radioactive emanations passing through an electric field. Which type of emanation is represented by the arrow labeled 1?

• alpha particle

• Positron

• beta particle

• gamma ray

Positrons are spontaneously emitted from the nuclei of

• potassium-37

• nitrogen-16

• radium-226

• thorium-232

According to Reference Table N, which pair of isotopes spontaneously decays?

• C-12 and N-14

• C-14 and N-14

• C-12 and N-16

• C-14 and N-16

Which notation of a radioisotope is correctly paired with the notation of its emission particle?

• 37Ca and 4He

• 235U and 0+1e

• 16N and 11p

• 3H and 0-1e

Which nuclear decay emission consists of energy, only?

• alpha particle

• gamma radiation

• beta particle

• positron

What is the decay mode of 37K?

• β−

• γ

• β+

• α