The Periodic Table


1778 - Antoine Lavoisier


Antoine Lavoisier wrote the first extensive list of elements containing 33 elements. He also distinguished between metals and non-metals.

1828 - Jöns Jakob Berzelius


Jöns Jakob Berzelius introduced letters to symbolise each element, this then became the new language of chemistry. Berzelius also developed a table of atomic weights.

1864 - Lothar Meyer


Lothar Meyer produced a table of 28 elements listed by their valency, he classified elements into six families according to their valence.

1869 - Dmitri Mendeleev


Dmitri Mendeleev created the periodic table similar to what we use today. His Periodic Table was compiled on the basis of arranging the elements in ascending order of atomic weight and grouping them by similar properties. He predicted the existence and properties of new elements that were yet to be discovered. He is known as the ‘father of the periodic table’.

1894 - William Ramsay


William Ramsay discovered neon, argon, krypton and xenon, which have similar properties to helium and radon. This then formed a whole new group of the periodic table, the noble gases.

1913 - Henry Moseley


Henry Moseley determined the atomic number of each of the elements. He modified the 'Periodic Law' so that the properties of the elements vary periodically with their atomic numbers. He also predicted that there were 3 unknown elements between aluminium and gold.