Radioactivity Leaving Cert

Which type of radiation does not consist of particles?

• Alpha radiation

• Gamma radiation

• Beta radiation

Nuclear reactions involve...

• conservation of mass

• energy combining from intermolecular bonds

• release of energy from nucleus

• none of these answers are correct

Beta decay involves a proton changing into a neutron and an electron which is emitted

• True

• False

This scientist is credited with the discovery of radioactivity

• Becquerel

• Moseley

• Rontgen

• Thompson

Radioactivity is the spontaneous random decay of unstable nuclei with the emission of alpha, beta or gamma radiation

• True

• False

Gamma Radiation is

• found travelling at the speed of light

• not deflected in electric or magnetic fields

• only stopped by thick slabs of lead

• all of these are correct

When an unstable nuclei undergoes alpha or beta particle emission, a new element is formed. The changing of one element to another is called

• Transfiguration

• Transmutation

• Transformer

• Transcendence

What type of decay is shown here?

• Alpha decay

• Beta decay

• Gamma decay

Beta particles...

• are not affected by electrical fields

• Have no mass

• all of these answers are correct

• have a negative charge

The half-life of an element is the time taken for....

• half of the radiation to be emitted

• half the nuclei of the given sample to decay

• half the carbon-14 of a substance to be emitted