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际此原子时代,铀与钍二元素,最为世人所重视。然钶Columbium(或Niobium)与钽Tanta-lum 二元素,对于国防工业,其用途亦殊繁广,其重要性与日俱增,亦不可不注意者也。钶与钽二烯有元素在化学周期表中,与钒同属第五族之乙组、是以钒、钶、钽之化学性状均极相似,尤以钶、钽二者更为相近,其氧化物常合称土酸。钶与钽之提炼,在数十年前已有成就,但因
In this atomic era, uranium and thorium two elements, the most people attach importance. However, Columbium (or Niobium) and tantalum Tanta-lum are two elements which are also of great use to the defense industry. Their importance is also growing day by day.钶 and tantalum have elements In the periodic table of the chemical, and vanadium belong to the fifth group B, so the chemical properties of vanadium, 钶, tantalum are extremely similar, especially 钶, tantalum are more similar, the oxidation Often commonly known as soil acid.钶 and tantalum refining, has been achieved decades ago, but because