"Lead has been used extensively since ~7000 BCE 1. Its chemical symbol Pb is short for plumbum, the Latin word for lead. This is the origin of the word plumber and plumbing as lead has been widely used for water pipes in the home since Roman times 1."
Expected headings
"Basic chemistry"
"Four stable isotopes of lead account for virtually all of the lead on earth; lead-208 is the most abundant, forming 52.4%. Lead-206 and lead-207 form 24.1% and 22.1% of the total respectively. Lead-204 constitutes the remaining 1.4%. Almost forty other radioactive lead isotopes are known, many with very short half-lives 3."