The first table of standard atomic weight (atomic mass) was published by John Dalton (1766–1844) in 1805, based on a system in which the relative atomic mass of hydrogen was defined as 1.
Tabel pertama berat atom standar (berat atom) pertama dipublikasikan oleh John Dalton (1766–1844) pada tahun 1805, berdasarkan sistem di mana massa atom relatif hidrogen didefinisikan sebagai 1.