00:02
We've been asked to identify which of these elements between lithium, magnesium, scandium, zirconium, lanthanum, and radium, which we see on the given figure, is produced by the decay of uranium 238.
00:17
Now, to figure this out, first let's look at the fact that uranium is found down here in the lanthanides.
00:28
Excuse me, the actinides.
00:30
So found right about here with an atomic number of 92.
00:37
Now let's look at the rest of these atomic numbers and see what we can spot.
00:41
So radium is going to be 88.
00:44
Lanthanum will be 57.
00:47
Zirconium will be 40, scandium 21, magnesium 12, and lithium 3...