Fänkt mat der Atomnummer un
D’Atomnummer Z ass d’Zuel vun de Protonen am Kär a bestëmmt d’Element eindeutig. Natrium huet Z = 11, also enthält all Natriumkär 11 Protonen.
Atomnummer
Mendeleev
Periodescht System · chemistry · physics
How to use this page
Start by identifying the quantity, element or phenomenon being studied, then connect it with a concrete situation. A scientific formula becomes much easier to understand once every term and unit has a clear physical meaning.
Mendeleev’s habit: always check the order of magnitude. A calculation can look correct while giving a physically impossible result when a unit has been forgotten or converted incorrectly.
Da liest Symbol, Numm a Mass
Na ass dat chemescht Symbol fir Natrium. Den dezimale Massewäert a ville Tabellen ass net d’Atomnummer a soll net mam Massenzuel vun engem bestëmmten Isotop verwiesselt ginn.