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。

youdao

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。

youdao

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。

youdao

And so we have a positive charge in the nucleus which is given by the number of protons.

在原子核上,有很多质子聚集而形成的正电荷。

麻省理工公开课 - 固态化学导论课程节选

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。

麻省理工公开课 - 固态化学导论课程节选

The same number of electrons, but the number of protons keeps going up, up, up.

他们都是等电子，但是质子数在增加。

麻省理工公开课 - 固态化学导论课程节选

For a nucleus to spin at all, the total number of protons and neutrons it contains must be odd.

ECONOMIST: Medical imaging