So carbon 12. We know that it has the proton number, by definition, is 6. And the neutron number, 6 from 12 is 6. So it has 6 protons and 6 neutrons.
所以碳12,我们知道它有质子数,根据定义,那就是6,而电子数,12减6等于6,所以它有6个中子。
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。
And note that as Z increases, as the proton number increases the radius decreases for a given n number.
并注意到当Z不断增加,对于一个给定的n,即当质子数增加的时候,半径的n值就减小了。
Maybe not. It has no protons, so therefore, it has no electrons Because proton number equals electron number, which means if it has no protons 0 its atomic number is zero.
也可能不会,这个元素没有质子,因此,也没有电子,因为质子数等于电子数,意味着它没有质子,它的原子序数为。
So we get at the number of neutrons indirectly because we know the proton number here.
所以,我们可以间接得到中子数,因为我们知道质子数了。
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。
And, that's equal to the product of e the proton number times e.
正等价于,质子数乘以。
The proton number is in the lower left corner.
质子数是在左下方。
And we began with the proton number.
我们从质子数开始。
This is sum of protons plus neutrons.
它是质子数加上中子数。
They all have the same Z, the same proton number, but different A, which means number of neutrons varies.
有相同的Z,相同的质子数,但是不同的A,也就是中子数不同。
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。
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