411 REFERENCE · Wiktionary
Protonenzahl
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
German
Etymology
de :af Proton -n-<alt:-en-> Zahl
From de Proton -n- -en- Zahl.
Noun
f
de physics proton number, atomic number
de Atomnummer Ordnungszahl
Declension
f