Bradley5345 t1_itqqvrt wrote on October 25, 2022 at 4:46 PM

Reply to comment by shmootz in TIL Amedeo Avogadro's contribution to chemistry, known as Avogadro's law, did not initially receive much attention when he published his paper in 1811. It was only a century later that his work was recognized, when the King of Italy attended a meeting commemorating the paper's 100th anniversary. by dustofoblivion123

The molar masses reported on the periodic table account for this by being a weighted average of the masses of any isotopes multiplied by their fractional abundance as they occur in nature. Also, it’s neutrons. Hence, when he said average mass, he was accounting for what you’re saying. There’s a reason these molar masses aren’t whole numbers.