| Definition of an
Isotope:
One of two or more
atoms having the same atomic number but differing in atomic
weight and mass number. The nuclei of isotopes of the same element
have the same number of protons (equal to the element's
atomic number) but have different numbers of neutrons.
The isotopes of a given element have identical chemical properties
but slightly different physical properties. A radioactive isotope,
or radioisotope, is a natural or artificially created isotope
having an unstable nucleus that decays, emitting alpha, beta,
or gamma rays (otherwise known as radioactivity) until
stability is reached. For most elements, stable and radioactive
isotopes are known.
Studying
the geologic history of earth.
What powers the sun?
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