| Name | Year | Development |
| Antoine Lavoisier | 1743- 1794 |
listed and classified elements according to metals and non-metal |
| Johann Dobereiner |
1780- 1849 |
classified
elements into groups of 3 - Dobereiner's Triads |
| John Newlands | 1837- 1898 |
showed
periodic pattern in chemical properties after every 8 elements - Law of Octave |
| Dmitri Mendeleev | 1834- 1907 |
arranged elements in increasing atomic
mass; provided way to predict properties of elements using his table |
| Henry Moseley | 1887- 1915 |
arranged the elements in increasing atomic number (number of
protons);
his table is the basis for the Modern Periodic
Table
|
| Nama | Tahun | Perkembangan |
| Antoine Lavoisier | 1743- 1794 |
menyenarai dan mengelaskan unsur-unsur menurut logam dan bukan logam |
| Johann Dobereiner |
1780- 1849 |
mengelaskan
unsur-unsur ke dalam kumpulan tiga - triad Dobereiner |
| John Newlands | 1837- 1898 |
menunjukkan
corak berkala dalam sifat-sifat kimia selepas setiap 8 unsur -
Hukum Octaf |
| Dmitri Mendeleev | 1834- 1907 |
menyusun unsur-unsur menurut
peningkatan jisim atom; membolehkan ramalan sifat kimia unsur menggunakan jadualnya |
| Henry Moseley | 1887- 1915 |
menyusun unsur-unsur
menurut peningkatan nombor atom (bilangan proton) jadualnya merupakan asas Jadual Berkala
Moden
|
