Atomic Theory 4 - Radioactivity
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7 Terms
What is a radioactivity?
Spontaneous disintegration of the nucleus with the emission alpha, beta or gamma radiation
What is a nuclear reaction?
Change in the nucleus of an atom and a new element is formed as a result
What is a chemical reaction?
Electrons being shared or transferred from one atom to another - the nucleus of the atom remains the same
What is a half-life?
Time taken for half the nuclei in a given sized sample to decay
What is a radioisotope?
Isotope of an element that undergoes radioactive decay
What is nuclear fission?
Splitting of a nucleus into two roughly equal fragments
What is nuclear fusion?
Joining of two smaller nuclei to form a larger one
Note 
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