Template for Electronic Submission to ACS Journals

Provide the query CID in the search box and run the search. Repeat the search with the “same isoto

note in the query, this gives #24 and #23, which in the advanced search,
#23 1:1 CovalentUnitCount
#24 56 documents

A quick scan showed only 1 covalent unit in -24, so was -23 done just because it is good practice?

Also, the entrez history shows here too.

Also, in the first search with 56 results, the first three did not have isotopes specified, while in the seconds search, those were the only ones to come out. Does it always give priority in the search to ones without isotopic labels?

This leads to a bigger question. are the molar masses from the periodic table, or are they related to specific isotopes?