Niobium
Chemical element
Niobium is a chemical element; it has symbol Nb and atomic number 41. It is a light grey, crystalline, and ductile transition metal. Pure niobium has a Mohs hardness rating similar to pure titanium, and it has similar ductility to iron. Wikipedia
铌 ( ní ) (英语:Niobium),是一种化学元素,其化学符号为Nb,原子序数为41,原子量为7001929063700000000♤92.90637 u。铌曾有旧称钶(英语:Columbium;化学 ...
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铌(Niobium),化学符号Nb,原子序数为41,是一种过渡金属元素。铌单质是一种带光泽的灰色金属。高纯度铌金属的延展性较高,但会随杂质含量的增加而变硬。
铌,汉语二级字,读作铌(ní),一种金属元素。铌能吸收气体,用作除气剂,也是一种良好的超导体。旧称“钶”。
Mar 16, 2020 · 铌的化学符号为Nb,原子序数41,原子量92.90638,属VB族,钢灰色金属,粉末呈深灰色,熔点2468℃,沸点4742℃,密度8.57 g/cm3。只有六种元素的熔点高于 ...