Naturally occurring Iron consists of 4 isotopes.
http://education.jlab.org/itselemental/iso026.html
Naturally occurring titanium (Ti) is composed of 5 stable isotopes; 46Ti, 47Ti, 48Ti, 49Ti and 50Ti with 48Ti being the most abundant (73.8% natural abundance).
Lead has 4 stable isotopes… (204)Pb, (206)Pb, (207)Pb, and (208)Pb.
Arsenic is known to have 35 different isotopes.
Silver has two stable isotopes and 28 radioisotopes.
Plutonium has no stable isotopes, it does have 20 characterized radioisotopes.
My element is Mercury and it contains 7 isotopes within it.
Iodine has 37 Isotopes. 127I is the only stable one.
My element is Urnaium and it has 16 isotopes which are all radioactive.