Un bloco del tabella periodic es un collection de gruppos adjacente.
Appare que le termina esseva initialmente usate (in francese) per Charles Janet. Le respective electrones de energia plus alte in cata elemento in un bloco pertine al mesme typo de orbital atomic. Cata bloco es appellate pro su orbital characteristic; ergo le blocos es:
Le nomines del blocos (s, p, d, f, g) se deriva del qualitate del lineas spectroscopic del orbitales atomic associate: distincte (sharp in anglese), principal, diffuse, e fundamental, le resto essente appellate in ordine alphabetic. Blocos es a alicun vices appellate familias.
Le ordine pro plenar le orbitales de "subconchas" obedi al principio Aufbau, que etiam explica le ordine linear del blocos (con numeros atomic crescente) in le tabella periodic:
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