00:01
So now we'll work on problem 96 from chapter 4.
00:05
In this problem, we're asked to complete a table with different isotopes and give all of their number of protons, neutrons, electrons, atomic number, and mass number.
00:19
So first we can go ahead and show what is given in the original table.
00:25
On the first column here, we have isotope, and we're given five columns, but we're only given the identity of one.
00:33
One of the isotopes.
00:45
And we also need to write report atomic number, mass number, number of protons, neutrons, and electrons.
01:19
So we need to write first, we can fill in what we are initially given.
01:24
In this middle column, we're given zinc 64 as the identity of one of the isotopes.
01:31
In the first column, we're given 32 for the mass number, and 16 for protons, 24 and 20 for the number of neutrons and electrons in the second column.
01:43
In the third column, nine for the atomic number, and 10 for the number of neutrons, and 11 and 23 for atomic and mass number in the last column.
01:57
So starting from the left, first column, we know that if we have 16 protons, the atomic number should be 16.
02:05
We can subtract atomic number from mass number and get the number of neutrons to be 16, and the number of electrons should be 16 as well.
02:14
So the identity of this isotope, the element will be the element with atomic number 16, which is sulfur, and then we add in the mass number, which we're given as 32.
02:29
For the second column, we see that the number of electrons is 20, so the number of protons must be 20, and the atomic number must be 20.
02:37
The mass number we can find by summing the neutrons and protons...