What element has symbol Pb?
Symbol (chemistry) the material was known in ancient times, while for others, the name is a more recent invention. For example, "He" is the symbol for helium (New Latin name, not known in ancient Roman times), "Pb" for lead ("plumbum" in Latin), and "Hg" for mercury ("hydrargyrum" in Greek). Some symbols come from other sources, like "W" for tungsten ("Wolfram" in German, not known in Roman times). Temporary symbols assigned to newly or not-yet synthesized elements use 3-letter symbols based on their atomic numbers. For example, "Uno" was the temporary symbol for hassium (element 108) which had the temporary name of "unniloctium".
PB-22 As of 9 May 2014, PB-22 is no longer legal in New Zealand. In January 2014, PB-22 was designated as a Schedule I controlled substance in the United States. In Ohio, PB-22 is illegal. Florida also has banned PB-22. Since 13 December 2014 it is also illegal in Germany because of adding the substance to the BtMG Anlage II. As of October 2015 PB-22 is a controlled substance in China. PB-22 PB-22 (QUPIC or 1-pentyl-1"H"-indole-3-carboxylic acid 8-quinolinyl ester) is a designer drug offered by online vendors as a cannabimimetic agent, and detected being sold in synthetic cannabis products in Japan