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铁是第几周期第几族
更新时间: 2020-10-31 00:00:00  

铁是第四周期,Ⅷ族,它不是主族也不是副族,就叫Ⅷ族。元素周期表中有18列,其中7主,7副,还有1个零族,剩下的第八到第十列都是Ⅷ族。铁位于第八列。

铁是一种金属元素,原子序数26,铁单质化学式:Fe。铁有0价、+2价、+3价、+4价、+5价和+6价,其中+2价和+3价较常见,+4价、+5价和+6价少见。纯铁是白色或者银白色的,有金属光泽。熔点1538℃、沸点2750℃,能溶于强酸和中强酸,不溶于水。并且铁在生活中分布较广,占地壳含量的4.75%,仅次于氧、硅、铝,位居地壳含量第四。

关键词: 周期

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