Each atom of protium has one proton, no neutrons, and one electron. each atom of deuterium has one proton, two neutrons, and one electron. are these the same or different elements? why?

List charasteristics of athenosphere

Select the true statements about eubacteria. most live as decomposers and heterotrophs. most only thrive in a narrow range of environments. certain eubacteria are responsible for food poisoning. eubacteria thrive in extreme environments.

There are only about 250,000 known fossil species. true or false