What is radioactivity?
Atoms with unstable nuclei are constantly changing as a result of the imbalance of energy within the nucleus. When the nucleus loses a neutron, it gives off energy and is said to be radioactive. Radioactivity is the release of energy and matter that results from changes in the nucleus of an atom.
What is a radioisotope?
isotopes are atoms of the same element that have a different number of neutrons. In other words, the atoms have the same number of protons but a different number of neutrons in the nucleus. Because the like charges of the protons repel each other,there are always forces trying to push the atom nucleus apart. The nucleus is held together by something called the binding energy.
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