00:01
Hi there.
00:02
When we are writing the symbol for an element, you would write its abbreviation.
00:08
And then as a subscript before it is the atomic number.
00:16
And as a superscript before it is the mass number.
00:23
And then if it is not neutral, it will have a charge as a superscript after it.
00:30
So let's remind ourselves of what these things are.
00:33
The atomic number is the same as the number of protons.
00:39
And it determines the identity of the atom.
00:44
The mass number is the sum of the protons plus the neutrons.
00:56
And then the charge will result if it is not a neutral atom.
01:00
If it has gained or lost electrons, it will have a charge.
01:04
But we are told here that this is an atom and it does not appear to have a charge...