最轻的金属——锂。锂是所有金属中最轻的一种,把它扔到水里,会像软木塞一样漂浮在水面上。如果用锂做一架飞机,两个人就可以抬着走,不过,锂不能用来制造飞机,甚至连筷、匙也不能做,因为锂很软,用小刀就可以毫不费力地将它切开。锂的用途极广,在冶金工业上,利用它同氧、氮和二氧化碳均能反应的特性,来消除金属里的气泡;大家知道,铜的导电性常因杂质的 Lightest metal - lithium. Lithium is the lightest of all metals, threw it into the water, floating like a cork on the water. If you make a plane with lithium, two people can carry it. However, lithium can not be used to make aircraft. Even chopsticks and spoons can not be used because lithium is very soft and can be easily cut with a knife. open. The use of lithium is very wide, in the metallurgical industry, the use of it with oxygen, nitrogen and carbon dioxide can react with the characteristics of metal bubbles to eliminate; we all know, copper conductivity often due to impurities