00:01
So for this question, you're asked to find which are the isotopes of nickel given the following.
00:06
So you don't include which answers you have to choose from, but i'm going to give you the information that you'll need to figure out which is the correct answer.
00:16
So first, let's understand how isotopes are written and what an isotope is.
00:23
So an isotope has the same number of protons with a different number of neutrons.
00:39
So if you look at the periodic table, the atomic number is the number of protons.
00:46
The number of protons is what makes an element, an element.
00:51
So each element has a different number of protons.
00:55
If an element has one proton, it's hydrogen.
00:59
If an element has two protons, it's helium.
01:07
Likewise, if a proton or if an element has 28 protons, it's going to be nickel.
01:14
If you change the number of protons, it's going to be a different element.
01:18
So, in order to have an isotope, you have to have the same number of protons, because it's going to be the same element, but a different number of neutrons.
01:27
So when you see elements that are written, the mass number is generally written as the superscript or the number above...