Russian chemist Dmitri Mendeleev
All metals known to man are already included in the periodic table.
Helium with an atomic number of 2,is the lightest gas on the Periodic Table :)
Helium with an atomic number of 2,is the lightest gas on the periodic table :)
pokemon
The periodic table was first proposed by a Russian chemist Dimitri Mendeleev. The modern periodic table ordered by atomic number was proposed by an English physicist, Henry Moseley.
There are 118 Elements on the periodic table including plutonium and all the man made stuff and the unknown stuff to (Unnamed).
its not in the periodic table because its man made
The man-made elements will usually be found at the end of a modern periodic table. Look up periodic table in your search engine.
There are currently 118 elements in the periodic table, with 20 man-made and 88 (not 92) naturally-occurring elements. *Since 23rd October 2008.
Dmitri Mendeleev is another important figure in the development of the periodic table. He created the first widely recognized periodic table in 1869, arranging elements by increasing atomic weight and properties. Mendeleev's table successfully predicted the existence of missing elements and their properties.
Mendelevium.
95- 118