【題目】19世紀(jì)末,物理學(xué)家瑞利在研究中發(fā)現(xiàn),從空氣中分離得到的氮?dú)饷芏,與從含氮物質(zhì)制得的氮?dú)饷芏扔?/span>0.0064 kg/m3的差異,他沒(méi)有放過(guò)這一發(fā)現(xiàn),在化學(xué)家拉姆塞的合作下,經(jīng)過(guò)十幾年的努力,于1894年發(fā)現(xiàn)了空氣中的氬氣。下列說(shuō)法正確的是________(填序號(hào))

氬是一種化學(xué)性質(zhì)極不活潑的氣體;

瑞利從空氣中分離的氮?dú)馐羌儍粑铮?/span>

19世紀(jì)末以前,人們認(rèn)為空氣由氧氣和氮?dú)饨M成的;

瑞利發(fā)現(xiàn),從含氮物質(zhì)制得的氮?dú)饷芏却笥趶目諝庵蟹蛛x的氮?dú)獾拿芏取?/span>

【答案】①③

【解析】

試題分析:氬是稀有氣體(惰性氣體),化學(xué)性質(zhì)極不活潑;

瑞利從空氣中分離的氮?dú)庵泻∮袣怏w,不是純凈物;

19世紀(jì)末以前,人們認(rèn)為空氣由氧氣和氮?dú)饨M成的;

從含氮物質(zhì)制得的氮?dú)馐羌儍粑,而從空氣中分離的氮?dú)膺含有密度大于氮?dú)獾南∮袣怏w。所以從含氮物質(zhì)制得的氮?dú)饷芏纫 ?/span>

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