Periode-2-element
From Wikipedia, the free encyclopedia
From Wikipedia, the free encyclopedia
E periode-2-element is e chemisch element in de twidde reke (of periode) van 't periodiek système. Die element'n kenmerk'n under deurda d' 1s-schelle hêelegans met elektroonn gevuld is. Van 't begun toet 't ende van die periode word'n de 2s- en 2p-schelle ipgevuld. By lithium bevat de 2s-schelle êen elektron en by beryllium twêe elektroonn. Vanof boor toet neon wordt de 2p-schelle systemoatisch ipgevuld. D' element'n in de twidde periode zyn:
3 Li |
4 Be |
5 B |
6 C |
7 N |
8 O |
9 F |
10 Ne |
Chemisch element | Reekse | Elektronconfiguroatie | ||
---|---|---|---|---|
3 | Li | Lithium | Alkalimetoal | [He] 2s1 |
4 | Be | Beryllium | Eirdalkalimetoal | [He] 2s2 |
5 | B | Boor | Metalloïde | [He] 2s2 2p1 |
6 | C | Carbong | Niet-metoal | [He] 2s2 2p2 |
7 | N | Stikstoffe | Niet-metoal | [He] 2s2 2p3 |
8 | O | Zeurstoffe | Niet-metoal | [He] 2s2 2p4 |
9 | F | Fluor | Halogeen | [He] 2s2 2p5 |
10 | Ne | Neon | Edelgaze | [He] 2s2 2p6 |
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