long with new names, the scientists must propose two-letter symbols for the elements. When IUPAC has received the researchers’ suggestions, they will be put up for public review for five months. That allows scientists and others to raise any objections. In 1996, the symbol Cp was proposed for copernicium, or element 112, but it was swapped to Cn when scientists complained that Cp referred to another substance.
Why was the suggestion to use symbol Cp for copernicium not accepted?
The symbol was already being used for a different substance The symbol Cn was already assigned to it UIPAC did not receive the suggestion in time The symbol Co was already assigned to it