00:01
In this question, we want to do some calculations for the simple cubic unit cell for colonium.
00:07
So we want the mass of the unit cell.
00:10
So in this case, we need to realize that in a simple cubic unit cell, we have exactly one atom because the atoms are all in the corners of the cell.
00:22
So if we add up all of the corners of the atoms are actually in the cell, we have one of polonium.
00:30
So if we look at the period.
00:31
Table, we will get the atomic mass and that is 209 atomic mass units or can also be written as you.
00:43
So that is the mass of the unit cell.
00:46
We can convert it to grams.
00:49
The question does not really specify that we have to do that, but we can do it.
00:54
It makes it easier for us to check the literature value for the density.
00:58
So we can just go ahead and do that and then we get the mass of that unit cell.
01:05
Then we have the edge length of this unit cell...