americium
中文解釋
wordnet sense
Collocation Usage
Collins Definition
Noun
The chemical element of atomic number 95, a radioactive metal of the actinide series,
/aməˈriSHēəm/,
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The chemical element of atomic number 95, a radioactive metal of the actinide series,
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The chemical element of atomic number 95, a radioactive metal of the actinide series
Web Definitions:
- a radioactive transuranic metallic element; discovered by bombarding uranium with helium atoms
- The chemical element (symbol Am) with an atomic number of 95
- a silvery metal; it is a man-made element whose isotopes Am-237 through Am-246 are all radioactive. Am-241 is formed spontaneously by the beta decay of plutonium-241. Trace quantities of americium are widely used in smoke detectors, and as neutron sources in neutron moisture gauges.
- Symbol:"Am" Atomic Number:"95" Atomic Mass: (243)amu. Americium is one of the elements in the actinide series of inner transition elements. It may also be classified as a rare earth element. This element is radioactive and can be safely used in small amounts. ...
- An artificial radioactive element with atomic number 95 (symbol Am), produced in nuclear explosions and reactors; emits alpha particles.
- A fissionable, artificial element that can be used to produce nuclear explosives. The principal isotope, americium 241, is created as a result of the decay of plutonium 241. Other important isotopes are americium 242 and 243.