Science / Chemistry / Radioisotope: A radioactive isotope. For example, tritium is a radioisotope of hydrogen.


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

Actinium (Ac)

Science / Periodic Table of Elements / Actinium (Ac): Atomic number: 89, Atomic mass: 227 g.mol -1, Electronegativity: 1.1, Density: 10.07 at 20°C, Melting point: 1050 °C, Boiling point: 3250 °C, Vanderwaals radius: unknown, Ionic radius: unkno MORE

Beta Decay

Science / Biology / 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 electron an MORE

Alpha Decay

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

Decay Series

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

Radiometric Time

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