Phosphorus is considered practically monoisotopic: P-31; radioactive isotopes P-32 and P-33 exist only in traces.
Seaborgium has 12 isotopes; for the list of isotopes see the link below.
The isotopes 252Cf and 251Cf.
See the list of fermium isotopes at the link below.
Yes Neon has isotopes from 16-34.
The natural isotopes of copper are: Cu-63 and Cu-65.
All carbon isotopes have the same number of neutrons.
All carbon isotopes have the same number of neutrons.
The common isotopes of Rhodium are Rh-103, Rh-101, Rh-102, Rh-102m and Rh-99. They also happen to be stable. In addition to these isotopes, there are 30 other Rhodium isotopes.
The natural isotopes of nitrogen are: 14N with 99,634 % and 15N with 0,366 %.
Yes, butane does have isotopes. The most common isotopes of butane are carbon-12 and carbon-13. Isotopes of butane can have varying masses due to differences in the number of neutrons in the nucleus.
69 and 67
The most common isotope of uranium is uranium-238.