氫和鈾分別占據(jù)元素周期表的首末位置，氦是第二多的元素，是在一次日食時(shí)用分光鏡發(fā)現(xiàn)的，因此以希臘太陽(yáng)神赫利奧斯命名。多虧了門捷列夫的發(fā)明，化學(xué)現(xiàn)在才站穩(wěn)了腳跟~~~

?《萬(wàn)物簡(jiǎn)史》推出部落節(jié)目版，戳這里訂閱:http://bulo.hujiang.com/menu/6004/



書本的朗讀語(yǔ)音很charming的磁性英音~~~大家可以好好學(xué)著模仿哦~~~??！
因?yàn)樵鵀槊绹?guó)人所寫,單詞采用美式拼法,不抄全文，也不用寫序號(hào)。答完一空換行繼續(xù)下一空作答。文中需聽(tīng)寫單詞或詞組用[-No-]表示，句子用[---No---]表示。請(qǐng)邊聽(tīng)寫邊理解文意，根據(jù)下面的TIPS訓(xùn)練聽(tīng)寫。這樣可以提高聽(tīng)力準(zhǔn)確度，并為訓(xùn)練聽(tīng)譯打下基礎(chǔ)哦~~~

TIPS聽(tīng)寫訓(xùn)練點(diǎn)：?jiǎn)卧~拼寫，時(shí)態(tài)，單復(fù)數(shù)，連讀，長(zhǎng)難句（請(qǐng)邊聽(tīng)邊用符號(hào)先記下內(nèi)容，然后自己回頭組織語(yǔ)句，最后校對(duì)，不要逐字逐句聽(tīng)寫）當(dāng)然啦，還有很多相當(dāng)?shù)氐啦诲e(cuò)的表達(dá)方法可以順道一起學(xué)到!



Hints:
incidentally
hydrogen
Mendeleyev



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---]



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.
有關(guān)原子的結(jié)構(gòu)和質(zhì)子的意義，我們將在下一章加以敘述。眼下，我們只來(lái)認(rèn)識(shí)一下那個(gè)排列原則：氫只有一個(gè)質(zhì)子，因此它的原子序數(shù)是1，排在表上第一位；鈾有92個(gè)質(zhì)子，因此快要排到末尾，它的原子序數(shù)是92。在這個(gè)意義上，正如菲利普?鮑爾指出的，化學(xué)實(shí)際上只是個(gè)數(shù)數(shù)的問(wèn)題。（順便說(shuō)一句，不要把原子序數(shù)和原子量混在一起。原子量是某個(gè)元素的質(zhì)子數(shù)加中子數(shù)之和。）還有大量的東西人們不知道或不懂得。宇宙中最常見(jiàn)的元素是氫；然而，在后來(lái)的30年里，對(duì)它的認(rèn)識(shí)到此為止。氦是第二多的元素，是在此之前一年才發(fā)現(xiàn)的--以前誰(shuí)也沒(méi)有想到它的存在--而即使發(fā)現(xiàn)，也不是在地球上，而是在太陽(yáng)里。它是在一次日食時(shí)用分光鏡發(fā)現(xiàn)的，因此以希臘太陽(yáng)神赫利奧斯命名。直到1895年，氦才被分離出來(lái)。即使那樣，還是多虧了門捷列夫的發(fā)明，化學(xué)現(xiàn)在才站穩(wěn)了腳跟。