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Radium
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- Radium consists of 16 isotopes, the most abundant being the radioactive radium-226. this is a metallic substance, has a half-life of 1602 years and decays via a complicated chain, eventually leading to stable lead-206. along the way it decays to radon gas
- A radioactive metallic element (note: the chemical symbol is ra.)
- A radioactive element with the atomic number 88 and an atomic weight of 226. in nature, radium is found associated with uranium, which decays to radium, by a series of alpha and beta emissions. radium is used as a radiation source.
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რადიუმი, грузинский
Радий, русский
(лат . radium), ra, химический элемент ii группы периодической системы, атомный номер 88, атомная масса 226,0254, относится к щелочно-земельным металлам. радиоактивен; наиболее устойчивый изотоп 226ra (период полураспада 1600 лет). название от лат. radius - луч. серебристо-белый блестящий металл; плотность 5,5-6,0 г/см3, tпл 969 °с. химически очень активен. в природе встречается в урановых рудах. исторически первый элемент, радиоактивные свойства которого нашли практическое применение в медицине и технике. изотоп 226ra в смеси с бериллием идет на приготовление простейших лабораторных источников нейтронов.
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Radioactive, английский
- Radioactive can generally describe the property of a substance (or more accurately atomic nuclei) which are unstable and spontaneously decay (disintegrate) with the release of energy, the energy being either electromagnetic radiation , particulate or both
- Радиоактивный
- Generally, the property possessed by certain elements, such as uranium minerals, of spontaneously emitting alpha, teta, and/or gamma rays by the disintegration of the nuclei of their atoms.
- Atoms that are energetically unstable and decay to a stable condition by emitting radiation are said to be radioactive.
Complicated, английский
Associated, английский
- Соответствующий; связанный; присоединенный
- Experiencing through your own senses (seeing through your own eyes, hearing with your own ears, feeling with your own feelings.)
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რადიუმი, грузинский
ბოლოკი, грузинский
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