What are the different isotopes of rubidium?

Isotopes of the Element Rubidium. [Click for Main Data]. Most of the isotope data on this site has been obtained from the National Nuclear Data Center. Please visit their site for more information. read more

Rubidium (37 Rb) has 32 isotopes, with naturally occurring rubidium being composed of just two isotopes; 85 Rb (72.2%) and the radioactive 87 Rb (27.8%). Normal mixes [clarification needed] of rubidium are radioactive enough to fog photographic film in approximately 30 to 60 days. read more

False. Isotopes of the same element must differ in the number of neutrons, not protons. If the isotopes differed in the number of protons, they would be completely different elements. read more