Pekembangan Pengelompokan UnsurSri Rizka Fadila Guci1205735No. Urut 24

Development of Classification of Element

In 1913, The Modern Periodic Table of Elements by H.G.J.Moseley

(Aranged according to increasing of atomic number )

In 1869 The Periodic Table by D. Mendelev

In 1865 Group of seven ( the octave law )

In 1829Group of

Three(triad)

Metals, non-metals,Metalloi

ds

By 180030 Elements

Prehistoric time

Cu,Ag,Au