In the following alpha Decay problem, fill in the indicated area 256/103 Lr

Ithink that the use of creativity in the sciences entails that one produce something out of nothing or from another thing. with this, i think that the he wrote down his results as four parts of the atomic theory is the manifestation of the  creativity of john dalton.

The total number of nucleons

Idon't mean to be a smart alec, length of atoms' bonds is the simplest way to define it.