0电子层0族电子数ⅥAⅦA 2 He 氦 K 1s2 4.003 2 8 O 氧 2s22p4 16.00 9 F 氟 2s22p4 19.00 10 Ne 氖 L 2s22p4 K 20.18 8 2 16 S 硫 3s23p4 32.06 17 Cl 氯 3s23p5 35.45 18 Ar M 氩 L 3s23p6 K 39.95 8 8 2 34 Se 硒 4s24p4 78.96 35 Br 溴 4s24p5 79.90 36 Kr 氪 4s24p6 83.80 N M L K O N M L K P O N M L K 8 18 8 2 8 18 18 8 2 8 18 32 18 8 2 52 Te 碲 5s25p4 127.6 53 I 碘 5s25p5 126.9 54 Xe 氙 5s25p6 131.3 84 Po 钋 6s26p4 〔209〕 85 At 砹 6s26p1〔210〕 86 Rn 氡 6s26p1〔222〕
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