Answer:
Radioisotope -> An atom with an unstable nucleus
Radioactivity -> The spontaneous discharge of energy from an unstable nucleus
Radioactive Decay -> The process by which the nucleus of an unstable isotope changes
Strong Nuclear Force -> Binds protons and neutrons together in the nucleus
One Of The Countries Would Be Canada
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she founded the american red cross
about 55,000 men soldiers engaged in the battle of antietam confederate and union