Problem how to measure the masses of atoms of different elements? At a conference in 1860. Stanislao Cannizzaro re introduced Avogadro's idea and also introduced a simple method to measure the relative atomic masses by weighing the gases of the same volume. This idea gradually grew to be the periodic table 1 liter Oxygen 1 liter Hydrogen 16XProblem: How to measure the masses of atoms of different elements? At a conference in 1860, Stanislao Cannizzaro re￾introduced Avogadro’s idea and also introduced a simple method to measure the relative atomic masses by weighing the gases of the same volume. This idea gradually grew to be the periodic table. 16x 1x 1 liter Oxygen 1 liter Hydrogen