Question

which of the following have more than two naturally occurring isotopes
a. carbon. b.oxygen
c.hydrogen. d.chlorine ​

Answer 1

hydrogen has three natural isotopes and another four known artificial isotopes.[2] A further distinction among stable natural isotopes is division into primordial (existed when the Solar System formed) and cosmogenic elements (created by cosmic ray bombardment or other similar processes). or Hydrogen and its two naturally occurring isotopes, deuterium and tritium. All three have the same number of protons (labeled p+) but different numbers of neutrons (labeled n).