Radioactivity Flashcards
1
Q
Radioactivity
A
The spontaneous breaking up of an unstable nucleus with the emission of one or more types of radiation
2
Q
Alpha particle
A
Consists of 2 protons and 2 neutrons, the same as a helium nuclei with a positive charge and low penetrating ability
3
Q
Beta particle
A
A high energy electron with a negative charge and moderate penetrating ability
4
Q
Gamma rays
A
High energy electromagnetic radiation with no charge and a high penetrating ability
5
Q
Half life of a radioisotope
A
The time taken for half of the atoms in a sample of the isotope to decay
