Radioactivity Flashcards
1
Q
Radioactivity
A
the spontaneous breaking up of unstable nuclei with the emission of one or more types of radiation.
2
Q
Nuclear reaction
A
a process that alters the composition structure or energy of an atomic nucleus. New element formed
3
Q
Chemical reaction
A
electrons only involved.
4
Q
Half life
A
time taken for half of the nuclei of an element in any given sample to decay.
5
Q
Radioisotope
A
radioactive isotope.
6
Q
Alpha particles
Give example.
A
Helium nucleus; positive charge, lower penetrating ability. Americium-241
7
Q
Beta Particles
Give example.
A
Electron emitted from nucleus; negative charge, moderate penetrating ability. Carbon-14
8
Q
Gamma Particles
Give example.
A
no charge, greater penetrating ability.Cobalt-60
