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氢(非金属) 氦(惰性气体)
锂(碱金属) 铍(碱土金属) 硼(类金属) 碳(非金属) 氮(非金属) 氧(非金属) 氟(卤素) 氖(惰性气体)
钠(碱金属) 镁(碱土金属) 铝(贫金属) 硅(类金属) 磷(非金属) 硫(非金属) 氯(卤素) 氩(惰性气体)
钾(碱金属) 钙(碱土金属) 钪(过渡金属) 钛(过渡金属) 钒(过渡金属) 铬(过渡金属) 锰(过渡金属) 铁(过渡金属) 钴(过渡金属) 镍(过渡金属) 铜(过渡金属) 锌(过渡金属) 镓(贫金属) 锗(类金属) 砷(类金属) 硒(非金属) 溴(卤素) 氪(惰性气体)
铷(碱金属) 锶(碱土金属) 钇(过渡金属) 锆(过渡金属) 铌(过渡金属) 钼(过渡金属) 锝(过渡金属) 钌(过渡金属) 铑(过渡金属) 钯(过渡金属) 银(过渡金属) 镉(过渡金属) 铟(贫金属) 锡(贫金属) 锑(类金属) 碲(类金属) 碘(卤素) 氙(惰性气体)
铯(碱金属) 钡(碱土金属) 镧(镧系元素) 铈(镧系元素) 镨(镧系元素) 钕(镧系元素) 钷(镧系元素) 钐(镧系元素) 铕(镧系元素) 钆(镧系元素) 铽(镧系元素) 镝(镧系元素) 钬(镧系元素) 铒(镧系元素) 铥(镧系元素) 镱(镧系元素) 镏(镧系元素) 铪(过渡金属) 钽(过渡金属) 钨(过渡金属) 铼(过渡金属) 锇(过渡金属) 铱(过渡金属) 铂(过渡金属) 金(过渡金属) 汞(过渡金属) 铊(贫金属) 铅(贫金属) 铋(贫金属) 钋(贫金属) 砈(类金属) 氡(惰性气体)
钫(碱金属) 镭(碱土金属) 锕(锕系元素) 钍(锕系元素) 镤(锕系元素) 铀(锕系元素) 镎(锕系元素) 钚(锕系元素) 镅(锕系元素) 锔(锕系元素) 锫(锕系元素) 锎(锕系元素) 锿(锕系元素) 镄(锕系元素) 钔(锕系元素) 锘(锕系元素) 铹(锕系元素) 𬬻(过渡金属) 𬭊(过渡金属) 𬭳(过渡金属) 𬭛(过渡金属) 𬭶(过渡金属) 鿏(预测为过渡金属) 𫟼(预测为过渡金属) 𬬭(预测为过渡金属) 鿔(过渡金属) 鿭(预测为贫金属) 𫓧(贫金属) 镆(预测为贫金属) 𫟷(预测为贫金属) 鿬(预测为卤素) 鿫(预测为惰性气体)
8族  10族
IUPAC族编号 9
以元素的命名 钴族元素
(US, pattern A-B-A)
(Europe, pattern A-B)

↓ 周期
Image: Kobalt electrolytic and 1cm3 cube
27 过渡金属
Image: Rhodium powder pressed melted
45 过渡金属
Image: Iridium
77 过渡金属
7 (Mt)
109 过渡金属

原始核素英语primordial element




熔点 1768 K (1495 °C) 2237 K (1964 °C) 2739 K (2466 °C) 未知
沸点 3200 K (2927 °C) 3968 K (3295 °C) 4701 K (4428 °C) 未知
密度 8.9 g·cm−3 12.41 g·cm−3 22.56  g·cm−3 37.4  g·cm−3(推测)[1]
外观 银白色 银白色 银白色 未知
原子半径 125 pm 134 pm 136 pm 128 pm (推测)[1]
发现时间 1735 1803 1803 1982
左方一族: 9族元素
8族元素 10族元素


  1. ^ 1.0 1.1 Haire, Richard G. Transactinides and the future elements. Morss; Edelstein, Norman M.; Fuger, Jean (编). The Chemistry of the Actinide and Transactinide Elements 3rd. Dordrecht, The Netherlands: Springer Science+Business Media. 2006. ISBN 1-4020-3555-1. 
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