All the isotopes of a given element have the same number of protons, but differ in their number of neutrons, and hence in their atomic mass.
给定元素的所有同位素都含有相同的质子数，但它们的中子数不同，因此它们的原子质量也不同。
Early versions had the incorrect atomic number for some elements.
早期版本的一些元素原子序数不正确。
Early versions did not list an element for every atomic number.
早期的版本并没有为每个原子序数列出一个元素。
Then, there'd be an atomic number, for which there was no known element.
然后会出现原子序数，代表了未知元素。
The prediction was that an element with the same atomic number existed somewhere, but it just hadn't been found yet.
据预测，某个地方存在一种原子序数相同的元素，但它还没有被发现。
It is arranged according to increasing atomic number, which is the number of protons in each atom of an element.
它是根据原子序数的增加来排列的，原子序数是一种元素单个原子的质子数。
But right now I am going to give it to you as Mendeleev enunciated it. Atomic number, we will learn later, is the improvement.
但是现在我就要告诉你们，门捷列夫发表了它，原子序数，我们之后会学到，那是很大的进步。
Here is atomic radius versus atomic number.
这是原子半径和原子序数。
However, you also want to include the name, symbol, atomic number, and atomic weight; you can select each of these by using an XBL: content element in the template.
不过，我们还希望填充一些元素名、元素符号、元素号和原子量，可以在模板中使用xbl：content元素来选择这些内容。
PROFESSOR: five — there's five valence electrons, but the atomic number is actually seven.
教授：5，有5个价电子，但原子序数是7。
Clever periodic rings from ITSNONAME are available in silver, gold, and platinum. Each features the corresponding metal's atomic number and weight.
ITSNONAME出产的精明的元素表戒指，有银的金的和拜金的。每个都标记了金属的序号和重量。
What I am looking at here is boiling point as a function of atomic number.
我在看的是非典，作为原子序数的功能。
With six protons and six neutrons, carbon normally has an atomic number of 12.
具备6个质子和6个中子，碳原子数通常为12。
So, let's say we have an atomic number of 3, 3 that means we have 3 electrons, so we better hope to get our neutral atom that we have a charge of plus 3in the nucleus.
这也是很合理的，因为Z就是原子序数，假设原子序数是，那就有3个电子，那我们就希望,性原子有个带3个正电荷的原子核。
This is because even though z, the atomic number is still increasing, we are also getting further away from the nucleus.
从有效核电量方面来想一想为什么，这是因为，尽管，Z，原子序数依然在变大，但我们同时也在离原子核越来越远。
It is on the periodic table of elements under the symbol Bi at atomic number 83.
在元素周期表里序列号是83，标志是BI。
An element's atomic number is the number of protons in its nucleus.
一种元素的原子序数是其原子核中的质子数。
In order to improve radiation resistivity, the elements with smaller atomic number should be selected as dopants in both core and cladding of the fiber.
指出选用原子序数小的元素作光纤掺杂剂会有利于光纤抗辐照性能的提高。
What you see is that the radius changes with atomic number for constant electron number.
对于等电子数的粒子，离子半径随着，原子数的变化而变化。
In the 20th century, when the structure of atoms was understood, the table was seen to precisely reflect increasing order of atomic number.
20世纪，在了解原子结构后，周期表可精确地反映原子序数增加的顺序。
That is why this says atomic number, but for most intents and purposes we can say this could be atomic mass.
那就是为什么这里说原子序数，但如果没有意图和目的，我们就说是原子质量。
They have the same atomic number and hence nearly identical chemical behaviour but different atomic masses.
它们有相同的原子序数，因此化学行为几乎完全一样，但原子量不同。
No change in atomic number is possible without a radical change in properties.
性质不发生根本的改变，原子序数的改变是不可能的。
However, you also want to include the name, symbol, atomic number, and atomic weight; you can select each of these by using an.
不过，我们还希望填充一些元素名、元素符号、元素号和原子量，可以在模板中使用。
By the dual-energy ct method of nondestructive analysis, we can obtain the distribution images of both atomic number and electronic density or analysing petroleum core and distinguishing inclusions.
用该方法可得出检测样品的原子序分布图和电子密度分布图，用以分析油田岩芯以及区别其内含杂质。
Atomic number 18, atomic weight 39. 948, is a rare gas. 1894 by the British chemist Rayleigh and Ramsay found.
原子序数18，原子量39。948，是一种稀有气体。1894年由英国化学家瑞利和拉姆赛发现。
One of them here I happened to choose is boiling point versus atomic number.
其中之一，我已经选择的是，沸点及原子序数。
"Radioisotopes" refer to a certain type of elements producing radiation decay that have the same atomic number but different mass of nuclides.
放射性同位素，是指某种发生放射性衰变的元素中具有相同原子序数但质量不同的核素。
"Radioisotopes" refer to a certain type of elements producing radiation decay that have the same atomic number but different mass of nuclides.
放射性同位素，是指某种发生放射性衰变的元素中具有相同原子序数但质量不同的核素。
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