CHEMISTRY-RELATIVE ATOMIC MASSthe mass of a hydrogen atom 1/1H is equal to 1/12 of the mass of a carbon-12 atom,so its relative isotopic mass is 1.A magnesium atom 24/12Mg is twice as heavy as a carbon-12 atom,so its relative isotopic mass is 24再

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CHEMISTRY-RELATIVE ATOMIC MASSthe mass of a hydrogen atom 1/1H is equal to 1/12 of the mass of a carbon-12 atom,so its relative isotopic mass is 1.A magnesium atom 24/12Mg is twice as heavy as a carbon-12 atom,so its relative isotopic mass is 24再
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CHEMISTRY-RELATIVE ATOMIC MASSthe mass of a hydrogen atom 1/1H is equal to 1/12 of the mass of a carbon-12 atom,so its relative isotopic mass is 1.A magnesium atom 24/12Mg is twice as heavy as a carbon-12 atom,so its relative isotopic mass is 24再
CHEMISTRY-RELATIVE ATOMIC MASS
the mass of a hydrogen atom 1/1H is equal to 1/12 of the mass of a carbon-12 atom,
so its relative isotopic mass is 1.A magnesium atom 24/12Mg is twice as heavy as a carbon-12 atom,so its relative isotopic mass is 24
再给另一个例子
不要用英文角度解释

CHEMISTRY-RELATIVE ATOMIC MASSthe mass of a hydrogen atom 1/1H is equal to 1/12 of the mass of a carbon-12 atom,so its relative isotopic mass is 1.A magnesium atom 24/12Mg is twice as heavy as a carbon-12 atom,so its relative isotopic mass is 24再
这就是说的相对分子质量的事
肯定能翻译过来吧
基本意思就是说
一个氢原子的的质量是碳12原子质量的12分之一,所以氢的相对原子质量为1
镁原子的质量是碳原子质量的2倍,所以镁原子的相对原子质量是24.
可能你不知道这个东西：
国际规定　　把一个碳-12原子的质量分为12等份,（碳原子有好几种,其中有一种碳原子它的原子核中含6个质子和6个中子,加起来是12,所以把它称为碳-12.当然还有其它如碳-14等,它含有8个中子和6个质子加起为14.国际上之所以要选用碳-12而不用碳-14是因为当选用碳-12原子作标准时,其它原子的相对原子质量都接近整数,便于记忆与使用）.那每一份的质量就是：一个原子的质量/（1/12×一个碳-12原子的质量）=一个原子的质量/1.667e-27kg.

翻译：一个氢原子H(1)(1)的质量等于一个碳12原子质量的12分之一，因此氢H(1)(1)的相对原子质量为1。一个镁原子Mg(24)(12)的质量为碳12原子的两倍，所以Mg(24)(12)的相对原子质量为24
注：Mg(24)(12)意思是质量数24，原子序数12；H(1)(1)是指质量数为1，原子序数1
要举另一个例子的话，可以说He-4的原子质量为碳的三分之一，因此He的原...

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翻译：一个氢原子H(1)(1)的质量等于一个碳12原子质量的12分之一，因此氢H(1)(1)的相对原子质量为1。一个镁原子Mg(24)(12)的质量为碳12原子的两倍，所以Mg(24)(12)的相对原子质量为24
注：Mg(24)(12)意思是质量数24，原子序数12；H(1)(1)是指质量数为1，原子序数1
要举另一个例子的话，可以说He-4的原子质量为碳的三分之一，因此He的原子质量为4

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a relative CHEMISTRY-RELATIVE ATOMIC MASSthe mass of a hydrogen atom 1/1H is equal to 1/12 of the mass of a carbon-12 atom,so its relative isotopic mass is 1.A magnesium atom 24/12Mg is twice as heavy as a carbon-12 atom,so its relative isotopic mass is 24再 relative relative chemistry chemistry 英语翻译a relative of me 还是 a relative of mine who is also a relative of me. Are you good ( ) chemistry?A.atAre you good ( ) chemistry?A.atB.forC.withD.to 是a chemistry change 还是a chemical change Combine the pairs of sentences by supplying a defining relative I have to study for a chemistry test 同义句 Cookery is not chemistry.It is a art.求翻译 Journal of Materials Chemistry A影响因子是多少 There is a new( ) lab in our school.A.chemical B.chemistry C.chemicals D.chemistry's Relative Market relative是什么意思? Sat chemistry