What did Lothar Meyer contribute to the study of the periodic table?


Corroborated what was proposed by Mendeleiev and added that the physical properties of the elements show periodicity with the increase of atomic weight.
Ordered the elements according to their atomic mass.
Grouped the elements in 3, taking into account their similar properties and indicated that the atomic mass of the second element is the average of the atomic masses of the two elements.
None of the above.