lead-208

lead-208

[′led ¦tü¦ō′āt]
(nuclear physics)
Lead isotope, atomic mass number of 208, which is formed by the radioactive decay of thorium.
References in periodicals archive ?
It is the heaviest non-radioactive element which occurs naturally on earth in the form of four isotopes: lead-208, 207, 206, and 204.
Examples are helium-4, oxygen-16, calcium-40, calcium-48 and lead-208.