What is the nuclear charge of an element?
Well, you have to have the element first.........
And then you have to have a copy of the Periodic Table. There should be one beside you now if you are doing your chemistry/physics homework. So let's say that we have the element nitrogen. And at the moment the element nitrogen, as
From the Periodic Table, this tells me that
But if there are 7 positive charges associated with nitrogen, electrical neutrality would insist that there are 7 negative charges. And indeed there are 7 negative charges, 7 electrons, fundamental negative charges of negligible mass, that are conceived to whizz about the nitrogen nucleus.
But the mass of the nitrogen atom is usually
We would identify this nitrogen nucleus as the
The atomic mass quoted on the Periodic Table is the weighted average of the individual isotopes. Most elements, even the simplest element hydrogen, have a number of accessible isotopes: cf, hydrogen,
And that's the basis of atomic physics in a couple of paragraphs. Remember to read your text to consolidate your understanding, and consult old exam questions to see what level of detail you have to know.