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    居里夫人發現鐳的故事

    2018-10-31 15:55:01 少兒百科 來源:http://www.ssiise.com 瀏覽:

    導讀:   瑪麗亞·斯克沃多夫斯卡-居里,通常稱為瑪麗·居里或居里夫人,波蘭裔法國籍女物理學家、放射化學家。以下是煙花美文網www.ssiise.com ......

    【www.ssiise.com - 少兒百科】
      瑪麗亞·斯克沃多夫斯卡-居里,通常稱為瑪麗·居里或居里夫人,波蘭裔法國籍女物理學家、放射化學家。以下是煙花美文網www.ssiise.com 分享的居里夫人發現鐳的故事,希望能幫助到大家!

      居里夫人發現鐳的故事

      瑪麗1867年出生于波蘭的華沙,高中畢業后,曾患了一年的精神疾病。由于是女性的原因,她不能在俄羅斯或波蘭的任何大學繼續進修,所以她做了幾年的家庭教師。最終,在她姐姐的經濟支持下移居巴黎,并在索邦(巴黎大學的舊名)學習數學和物理學。

      經過四年的努力后,瑪麗于巴黎大學取得物理及數學兩個碩士學位。在那里,她成為了該校第一名女性講師。瑪麗在索邦結識了另一名講師——皮埃爾·居里,就是她后來的丈夫。他們兩個經常在一起進行以瀝青鈾礦石為主的放射性物質的研究,因為這種礦石的總放射性比其所含有的鈾的放射性還要強。在研究過程中,她發現能放射出那種奇怪光線的不只有鈾,因此,她做出大膽判斷:還有一種物質能夠放射光線,這種新的物質,也就是還未發現的新元素,只是極少量地存在于礦物之中。居里夫人把它定名為“鐳”,因為在拉丁文中,它的原意就是“放射”。

      當時很多科學家并不相信,認為居里夫婦只是一種假設,甚至有人說道:“如果真有那種元素,請提取出來,讓我們瞧瞧!”要提煉鐳元素,需要足夠的瀝青鈾礦,而這種礦很稀少,價格又很昂貴,他們根本無法得到。這件事后來傳到奧地利,迅速得到奧地利政府的支持,奧地利政府贈送他們一噸已提取過鈾的瀝青礦殘渣,這才開始了提取純鐳的實驗。

      經過3年多的艱苦工作,居里夫婦終于在1902年提煉出0.1克鐳鹽,接著又初步測定了鐳的原子量。由于這種元素的放射性比鈾強200萬倍,因而它不用借助任何外力,就會自然發光發熱。

      鐳的發現,引起科學乃至哲學的巨大變革,為人類探索原子世界的奧秘打開了大門。可以說,它的發現,開辟了科學世界的新領域,并由此誕生了一門新興的放射學,所以,鐳被譽為“偉大的革命者”。正是因為居里夫婦為科學革命做出了巨大的貢獻,第二年,他們便獲得了諾貝爾物理學獎。

      過后不久,人們又發現鐳在醫學方面的價值,給癌癥患者帶來了福音,這使本來已經非常昂貴的鐳,變得更加珍貴。

      有人勸說居里夫婦說:“您如果去申請專利,定會成為百萬富翁!”“不,鐳是一種元素,它應屬于全世界!”居里夫婦毫不猶豫地回答。居里夫婦非常信奉“科學是無國界”的,也可以說,這是他們獻身科學的共同宏愿。

      但不幸的是,1906年4月的一天,在一次車禍中皮埃爾·居里失去了自己寶貴的生命。居里夫人強忍悲痛,繼續進行自己的科學研究。1910年,居里夫人成功地分離出純鐳,分析出鐳元素的各種性質,精確地測定了它的原子量。

      在同年居里夫人出席的國際放射學理事會上,制定了以居里名字命名的放射性單位,同時采用了居里夫人提出的鐳的國際標準。

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