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Recursos > química nuclear

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Transmutation

"Transmutation is the conversion of an atom of one element to an atom of another through nuclear reactions. Induced nuclear transmutation is transmutation which is induced by scientists by striking th ...

Half-life

"Half-life is the concept of time required for half of radioactive isotope’s nuclei to decay. The amount remaining is calculated as the (initial amount) (1/2) (# of 1/2 lives)^n in which the number of ...

Fusion

"Fusion involves the combining of atomic nuclei. Atoms with mass numbers lower than 60 undergo fusion while atoms with higher mass numbers undergo fission. The energy needed to break one mole of nucle ...

Fission

"Fission involves splitting atomic nuclei into fragments. Atoms with mass numbers close to 60 have been found to be the most stable. Atoms with mass numbers lower than 60 undergo fusion while atoms wi ...

Electron Capture

"Electron capture is a type of decay in which the nucleus of an atom draws in an innershell electron. Electron capture occurs when neutrons and protons are below the band of stability, but there is no ...

Radioactivity

"Radioactivity is a spontaneous process in which atoms with unstable ratios of protons and neutrons in their nuclei decompose into forms with higher stability. Radioactivity is unique because atoms ca ...

Nuclear Stability

"Nuclear stability is what makes certain isotopes radioactive. An isotope is unstable if it has a ratio of protons to neutrons that isn’t within what is called the “band of stability.” Elements with a ...

Beta Decay

"There are two types of beta decay: beta-plus decay and beta-minus decay. In beta plus decay the nucleus emits a positron (a positively charged electron) and a neutrino (a proton that changed into a n ...

Nuclear Reactions

"Nuclear reactions differ from other chemical reactions in that they involve changing the structure of the nucleus. Types of nuclear reactions include alpha decay, beta decay and gamma decay. Often pa ...

Alpha Decay

"Alpha decay is a type of radioactivity in which the nucleus of an atom loses an alpha particle. Alpha particles are composed of two protons and two neutrons, so they can also be called He2+ nuclei. T ...

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