File:Atomic_number_depiction.svg · Wikimedia Commons · See Wikimedia Commons
Ordnungszahl
Sign in to saveAlso known as atom number, proton number, number of protons
Anzahl der Protonen im Atomkern eines chemischen Elements
The atomic number is simply the count of protons in an atom's nucleus, and it's the fundamental property that defines what chemical element an atom is. This number matters because it determines an atom's chemical behavior and its place on the periodic table—atoms with the same atomic number are always the same element, whether they have different numbers of neutrons or not.
AI-generated from the Wikipedia summary — may contain errors.
Wikidata facts
- Subclass of
- physical quantity
- Image
- Isotope CNO.png
Show 4 more facts
- recommended unit of measurement
- 1
- on focus list of Wikimedia project
- Wikipedia:Vital articles/Level/4
- counts
- proton
- characteristic of
- chemical element
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Article · Deutsch
Die Ordnungszahl, auch Kernladungszahl, Atomnummer oder Protonenzahl, Formelzeichen meist von „Zahl“ (im englischen Sprachraum jedoch auch für Protonenanzahl), gibt die Stellung eines chemischen Elements im Periodensystem der Elemente an. Sie ist gleich der Anzahl der Protonen, die sich im Atomkern jedes Atoms dieses Elements befinden. Im elektrisch neutralen Atom ist die Ordnungszahl auch gleich der Anzahl der Elektronen.
Abstract from DBpedia / Wikipedia · CC BY-SA
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