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。
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。
The Numbers refer to the number of protons in the nucleus.
而元素的编号是依据元素原子核中质子的数量确定的。
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。
And it is equal to the sum of the number of protons plus the number of neutrons.
它等于质子数，加上中子数。
Heavier nucleus was believed to be formed of a number of protons and electrons packed closely together.
人们相信，较重的原子核是由若干个质子和电子紧密聚集在一起而形成的。
In any atom, the number of protons is equal to the number of electrons, and hence it is electrically neutral.
任何原子的质子数量与电子数量相等，因此是电中性的。
And it ranges according to increasing atomic number, which is the number of protons in each atom of an element.
它是根据逐渐增加的原子数量而排列的，原子的数量是原子中质子的数量。
The total mass of an atom is determined very nearly by the total number of protons and neutrons in its nucleus.
一个原子的总重量能够近似取决于这个原子核中的质子数和中子数之和。
When the total number of protons equals the total number of electrons, the body as a whole is electrically neutral.
当质子总数等于电子的总数时，这个物体就整体来说是电中性的。
The number of neutrons minus the number of protons in the atom of an isotope. isotopic number is an indication of radioactivity.
在一个同位素的原子中中子数减去质子数，同位数是放射性的指示。
They have the same number of protons in their nuclei (this is the defining characteristic of an element), but different Numbers of neutrons.
在它们的原子核中质子数是相同的(这是一个元素定义性的特征)，但是中子的数量不同。
As far as a whole is concerned, the body is electrically neutral, when the total number of protons equals the total number of electrons.
当质子总数等于电子的总数时，这个物体就整体而言是电中性。
Z Number of protons in the nucleus, this is number of protons in the nucleus, which in the neutral atom is equal to the number of electrons.
质子数。，Z，proton，number。,原子核中的质子数，这是原子核的质子数，在中性原子中，等于,电子数。
An atom containing an equal number of protons and electrons is electrically neutral, otherwise it has a positive or negative charge and is an ion.
原子含有相同数目的质子，电子电气中立的，否则它有一个积极或消极的收费，是一种离子。
Isotope: One of two or more species of atoms of a chemical element having nuclei with the same number of protons but different Numbers of neutrons.
同位素：一种化学元素的两个或多个类型，它们的原子核具有相同的质子数，而中子数却不同。
A substance composed of atoms having an identical number of protons in each nucleus. Elements cannot be reduced to simpler substances by normal chemical means.
元素元素，由原子组成的物质，其原子中的每一核子具有同样数量的中子、用一般的化学方法不能使之变得更为简单的物质的元素。
The number of protons, which are positively charged particles, determines the chemical properties of the atom, e. G. Whether it will bond with other atoms to form molecules.
组成，带正电质子的数目，决定了该原子的化学特性，例如它会否和其他原子结合成分子等。
Chemistry Physics a substance composed of atoms having an identical number of protons in each nucleus. Elements cannot be reduced to simpler substances by normal chemical means.
【物理学】元素：元素，由原子组成的物质，其原子中的每一核子具有同样数量的中子、用一般的化学方法不能使之变得更为简单的物质的元素。
The discovery of an additional belt of antiprotons won't have much impact on the danger it represents — the number of antiprotons is tiny compared to the electrons and protons trapped there.
这个一条反质子带的发现不会对它所代表的危险造成影响——相比于它所捕获的电子和质子而言，反质子的数量微乎其微。
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。
Iron and lead and oxygen and gold and all the others differ from one another merely in the number and arrangement of the electrons and protons which they contain.
钢铁、石墨、氧气、黄金以及所有这些不同的物质之间的区别只不过是它们含有的质子和原子的数量不同、排列方式不同罢了。
It records how many protons and electrons the atoms of a particular element contain. It permits us to calculate the number of neutrons in the most common isotope for most elements.
它记录了特定元素的原子包含有多少质子和电子，它使我们能够计算大多数元素最常见的同位素中中子的数目。
It records how many protons and electrons the atoms of a particular element contain. It permits us to calculate the number of neutrons in the most common isotope for most elements.
它记录了特定元素的原子包含有多少质子和电子，它使我们能够计算大多数元素最常见的同位素中中子的数目。
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