191 The nuclide Os decays with B-energy of 0.14
MeV accompanied by y rays of energy 0.042
MeV and 0.129 MeV.

the answer is learned

the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.

i think its 100

i hope this !