It is an isotope that occurs in nature, and is not manmade. Isotopes, by the way, are atoms that have the same number of protons, but different number of neutrons. The atomic number is the same, but atomic weight (or mass) is different. For instance, Carbon can be Carbon 10, 11, 12, or 14. They are all carbon.
Gold-198 is a synthetic isotope that is produced artificially by bombarding gold-197 with neutrons in a nuclear reactor.
Ytterbium is a naturally occuring rare earth element. However, an isotope of Ytterbium (Ytterbium-169) is an artificially produced isotope.
copper is a naturally occuring element
A biopesticide is any naturally-occuring pesticide.
No, the atomic mass of chlorine on the periodic table is actually an average of all the naturally occurring isotopes of chlorine, taking into account their relative abundance. The most common isotope of chlorine is chlorine-35, but there is also a small percentage of chlorine-37, which contributes to the overall atomic mass.
82 in the stable isotope 139 La which makes up over 99% of naturally occuring lanthanum. It has 81 in the stable isotope 137La which makes up <1% of naturally occuring Lanthanum.
Gold-198 is a synthetic isotope that is produced artificially by bombarding gold-197 with neutrons in a nuclear reactor.
Ytterbium is a naturally occuring rare earth element. However, an isotope of Ytterbium (Ytterbium-169) is an artificially produced isotope.
Gold-198 is not naturally occuring.
No it is naturally occuring
Naturally occuring
copper is a naturally occuring element
Naturally occuring.
Gold-198 is not naturally occuring.
Naturally occuring evidence
A biopesticide is any naturally-occuring pesticide.
A biopesticide is any naturally-occuring pesticide.