00:01
Okay, so this one's a pretty long question.
00:04
If you've got to prepare that table, the table that they want us to prepare is going to contain the number symbol, the number of protons, the number of neutrons, the mass number, and the percent natural abundance, which is given to us.
00:24
So, but not the mass of each particular isotope, which was given to us.
00:29
For some reason, they didn't want that in the table because it wasn't found in table 4 .2.
00:35
So we'll write the title for all of these columns.
00:42
And then we'll start with the first one, which is strontium 84.
00:48
Strontium 84 is going to have 84 is the mass number, but it's strontium, so it's going to have 38 is the atomic number.
00:56
There'll be 38 protons because it's strontium.
00:59
84 minus 38 gives us 46 neutrons.
01:02
The mass number is 84, and the percent natural abundance is given to us at 0 .56%.
01:10
We then go to strontium 86, which has a mass number of 86, still at strontium, so the number of protons is 38.
01:22
So 86 minus 38 gives us our number of neutrons, 48...