H E L P M E

complete the sentence

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled

How many moles are contained in 5.6 l of h2 at stp

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.