氢和铀分别占据元素周期表的首末位置,氦是第二多的元素,是在一次日食时用分光镜发现的,因此以希腊太阳神赫利奥斯命名。多亏了门捷列夫的发明,化学现在才站稳了脚跟~~~

❤《万物简史》推出部落节目版,戳这里订阅:http://bulo.hujiang.com/menu/6004/


万物简史:PART II CH 7基本物质(19)



书本的朗读语音很charming的磁性英音~~~大家可以好好学着模仿哦~~~!!
因为原著为美国人所写,单词采用美式拼法,不抄全文,也不用写序号。答完一空换行继续下一空作答。文中需听写单词或词组用[-No-]表示,句子用[---No---]表示。请边听写边理解文意,根据下面的TIPS训练听写。这样可以提高听力准确度,并为训练听译打下基础哦~~~


TIPS听写训练点:单词拼写,时态,单复数,连读,长难句(请边听边用符号先记下内容,然后自己回头组织语句,最后校对,不要逐字逐句听写)当然啦,还有很多相当地道不错的表达方法可以顺道一起学到!

万物简史:PART II CH 7基本物质(19)



Hints:
incidentally
hydrogen
Mendeleyev

万物简史:PART II CH 7基本物质(19)



The structure of atoms and the [-1-] of protons will come in a following chapter, so for the moment all that is necessary is to appreciate the organizing principle: hydrogen has just one proton, [---2---]; uranium has 92 protons, and so it comes near the end and has an atomic number of 92. In this sense, as Philip Ball has pointed out, chemistry really is just a matter of counting. ([---3---]) There was still a great deal that wasn't known or understood. [---4---] Helium, the second most [-5-] element, had only been found the year before—[-6-]—and then not on Earth but in the Sun, where it was found with a spectroscope during a solar eclipse, which is why it honors the Greek sun god Helios. It wouldn't be isolated until 1895. [---7---]

万物简史:PART II CH 7基本物质(19)



万物简史:PART II CH 7基本物质(19)

significance and so it has an atomic number of one and comes first on the chart Atomic number, incidentally, is not to be confused with atomic weight, which is the number of protons plus the number of neutrons in a given element. Hydrogen is the most common element in the universe, and yet no one would guess as much for another 30 years. abundant its existence hadn't even been suspected before that Even so, thanks to Mendeleyev's invention, chemistry was now on a firm footing.有关原子的结构和质子的意义,我们将在下一章加以叙述。眼下,我们只来认识一下那个排列原则:氢只有一个质子,因此它的原子序数是1,排在表上第一位;铀有92个质子,因此快要排到末尾,它的原子序数是92。在这个意义上,正如菲利普•鲍尔指出的,化学实际上只是个数数的问题。(顺便说一句,不要把原子序数和原子量混在一起。原子量是某个元素的质子数加中子数之和。)还有大量的东西人们不知道或不懂得。宇宙中最常见的元素是氢;然而,在后来的30年里,对它的认识到此为止。氦是第二多的元素,是在此之前一年才发现的--以前谁也没有想到它的存在--而即使发现,也不是在地球上,而是在太阳里。它是在一次日食时用分光镜发现的,因此以希腊太阳神赫利奥斯命名。直到1895年,氦才被分离出来。即使那样,还是多亏了门捷列夫的发明,化学现在才站稳了脚跟。