00:01
Okay, so we know bromine has two abundant isotopes, which are bromine 79 and 81.
00:08
And these are about an equal capacity, which means that their molecular ion peaks.
00:13
Typically yield two peaks that are about equal height.
00:19
Chlorine also has two abundant isotopes.
00:21
Chlorine 35 and chlorine 37, and these are in a 3 to 1 ratio.
00:27
So typically you'd see a molecular ion, a second molecular ion peak.
00:33
That's about one -third the size of the m plus one peak.
00:44
So carbon and oxygen each have one abundant isotope, which means it'll only have one molecular ion peak.
00:51
So we want to know which of these following molecules would we expect to show three molecular ion peaks with significant intensity.
00:58
And so we need to know what combination of these we would expect to have three molecular ion peaks.
01:05
So if we think about having bromine and chlorine together, if we had one of each, we could have both light versions of the isotope, which would give us an m plus peak...