Mass Number
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The mass number, also called atomic mass number or nucleon number, is the total number of protons and neutrons in an atomic nucleus. Because protons and neutrons both are baryons, the mass number A is identical with the baryon number B as of the nucleus as of the whole atom or ion. The mass number is different for each different isotope of a chemical element. This is not the same as the atomic number which denotes the number of protons in a nucleus, and thus uniquely identifies an element. Hence, the difference between the mass number and the atomic number gives the number of neutrons in a given nucleus: N=A Z.The mass number is written either after the element name or as a superscript to the left of an element's symbol. For example, the most common isotope of carbon is carbon-12, or 12C, which has 6 protons and 6 neutrons. This is technically redundant, as each element is defined by its atomic number, so it is often omitted.
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GarantieWeitere Informationen
- Allgemeine Informationen
- GTIN 09786130635039
- Editor Frederic P. Miller, Agnes F. Vandome, John McBrewster
- Sprache Englisch
- Genre Physik & Astronomie
- Größe H220mm x B150mm x T5mm
- Jahr 2010
- EAN 9786130635039
- Format Fachbuch
- ISBN 978-613-0-63503-9
- Titel Mass Number
- Untertitel Mass number, Proton, Neutron, Nucleon, Atomic nucleus, Baryon, Baryon number, Atom, Ion, Isotope
- Gewicht 137g
- Herausgeber Alphascript Publishing
- Anzahl Seiten 80
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