Which element exists as monatomic molecules at STP? (A) hydrogen (B) argon (C) nitrogen (D) chlorine

Calculate the number of moles of ethane in 100 grams

Draw two cyclic constitutional isomers of cis-1

Which statement best summarizes the importance of ernest rutherford’s gold foil experiment? it proved that all of john dalton’s postulates were true. it verified j. j. thomson’s work on the atomic structure. it showed that an electron circles a nucleus in a fixed-energy orbit. it showed that a nucleus occupies a small part of the whole atom.