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1s²2s²2p¹
Jest to Bor > B
Zad.2
1s²2s²2p⁶3s²3p⁶
Zad 3
Chrom jest wyjątkiem
a) 1s²2s²2p⁶3s²3p⁶4s¹3d⁵
b) K²L⁸M¹³N¹
C) [Ar]4s¹3d⁵
a)