Period 6 element
Platinum is a chemical element with the chemical symbol Pt and an atomic number of 78.
William Brownrigg
In 1741, Brownrigg's relative,Charles Wood, a British metallurgist, found various samples of Colombian platinum in Jamaica, which he sent to Brownrigg for further investigation. In 1750, after studying the platinum sent to him by Wood, Brownrigg presented a detailed account of the metal to the Royal Society, stating that he had seen no mention of it in any previous accounts of known minerals. Brownrigg wrote up Wood's experiments and did some of his own. He was the first to recognise it as a new element and by bringing the new metal to the attention of The Royal Society encouraged other scientists to start investigating it.