To identify the element, we need to compare the given mass of an atom to the atomic mass of known elements.
The mass of an atom in question is 2.65648×10⁻²⁴g.
Comparing this to the given value for the atomic mass of carbon-12 (1.66083×10⁻²⁴g), we find that the mass of the atom is larger than that of a carbon-12 atom.
Therefore, the given mass corresponds to an element other than carbon.
Without further information or context, it is not possible to determine the exact element based solely on the given information.