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Heerka 2 ee curiye

Ka Wikipedia
(Waxaa laga soo toosiyay Heerka 2)
Chemical elementChemical seriesElectron configuration
3LiLithiumAlkali metal[He] 2s1
4BeBerylliumAlkaline earth metal[He] 2s2
5BBoronMetalloid[He] 2s2 2p1
6CCarbonNonmetal[He] 2s2 2p2
7NNitrogenNonmetal[He] 2s2 2p3
8OOxygenNonmetal[He] 2s2 2p4
9FFluorineHalogen[He] 2s2 2p5
10NeNeonNoble gas[He] 2s2 2p6