Radioisotope: Term applied to a radioactive isotope, such as carbon-14 or uranium 238. Radioisotope nuclei are unstable and spontaneously breakdown and emit one of a number of types of radiation.

 

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Radioisotope: Term applied to a radioactive isotope, such as carbon-14 or uranium 238. Radioisotope nuclei are unstable and spontaneously breakdown and emit one of a number of types of radiation.

Actinium (Ac): Atomic number: 89, Atomic mass: 227 g.mol -1, Electronegativity: 1.1, Density: 10.07 g.cm-3 at 20°C, Melting point: 1050 °C, Boiling point: 3250 °C, Vanderwaals radius: unknown, Ionic radius . . . View Full Definition

Tritium: A radioisotope of hydrogen with two neutrons and one proton in its nucleus.

Radiometric Time: Type of absolute time determined by the relative porportions of radioisotopes to stable daughter isotopes.

Alpha Decay: Type of radioactive decay in which a radioisotope emits a large but slow-moving particle consisting of two protons and two neutrons.

Decay Series: Most radioisotopes do not decay into a stable daughter element in one single decay, but rather through a series of radioactive intermediaries.

Beta Decay: Type of radioactive decay in which a radioisotope emits a small, negatively-charged and fast-moving particle from its nucleus. The beta particle is similar in size, charge, and speed to an e . . . View Full Definition