Oxygen is the most important element in the periodic table, it's symbol is O . Oxygen is colorless and odorless, it was found in 1774 by a man named Joseph Priestly, the origin of the name oxygen comes from the Greek words oxus (acid) and gennan (Generate). Oxygen has a very important role in t...

Thorium, symbol Th, is a radioactive metal like element with a atomic number of 90. It is part of the actnide series of the periodic table. Thorium was discovered in 1828 by Baron Jons Jakob Berzelius, a Swedish chemist.Its is ranked 39 in quantites of elements in the earths crust....

Antonio de Ulloa discovered platinum in South America in 1735 and by Wood in 1741. Platinum is a silver-white metal that holds even more value then gold. Its atomic number is 78 and its mass is 195.08. It is also one of the heaviest metals. It is a transition metal and its electron configuration ...