00:02
All right, so for problem one, we are given three isotopes of oxygen.
00:17
We are told that they have mass numbers 16, 17, and 18.
00:25
We are also given that the atomic number of oxygen is 8.
00:38
We are asked to find how many protons in neutrons does each of the isotopes have? okay, so before we actually get into solving the problem, let's go over some of the terminology that was mentioned.
01:04
So isotopes, there are two or more forms of the same element that contain equal numbers of protons, but different numbers of neutrons in their nuclei.
01:15
So right off the back, because we know that these oxygen, oxygen 16, oxygen 17, and oxygen 18, are isotope.
01:27
This lends to them having the same number of protons.
01:33
Okay? so the next term is the atomic number.
01:38
If you recall, the atomic number is the number of protons found in the nucleus of every atom.
01:44
So we are told that the atomic number of oxygen is eight...