Name three radioactive elements

Name three uses of radiation

Deuterium is an isotope of hydrogen. What is meant by isotope?

Pair the following types of radioactive particle:

Light particle, helium nucleus, electron

Alpha, beta, gamma

Describe with an example what is meant by "half-life"

Technetium (TC) - Transition metal. Promethium (Pm) - Rare earth metal. Polonium (Po) - Metalliod.

Radioactivity tracers, fission products, controls fission reactions

Isotopes are variants of a particular chemical element which differ in neutron number. All isotopes of a given element have the same number of protons in each atom.

For example, the half-life of a radioactive substance is the amount of time it takes for half of its atoms to decay, and the half-life of a drug is the amount of time it takes before half of the active elements are either eliminated or broken down by the body.