radioaktivni raspad

radioaktivni raspad

The natural spontaneous disintegration or decomposition of a nucleus.

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raspad

化学; 普通化学

Change of an element into a different element, usually with some other particle(s) and energy emitted.

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1) Spontaneous emission by a heavier element (such as uranium) of positively charged helium nuclei - alpha particles - comprising 2 protons and 2 neutrons. The result of this ...

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The amount of time it takes for half an initial amount to disintegrate.

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It is equal to one-twelfth the mass of C -12 isotope of carbon, 1 amu = 1.66x 10-27 Kg.

atomski broj

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The number of protons in an atomic nucleus.

balmerove linije

物理; 普通物理

Lines in the spectrum of hydrogen atom in visible range, produced by transition between n 2 and n = 2, n is the principal quantum no.

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A unit of pressure, equal to 105 Pascals.

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subatomic particle composed of three quarks.

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A phenomenon of the periodic variation in the intensity of sound due to superposition of waves differing slightly in frequency.

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Flojd Mejveder

Born Floyd Sinclair on February 24, 1977, an American professional boxer. He is a five-division world champion, where he won nine world titles in five ...