A device that makes energy easier is a machine
true or false

What is the mass of 4 molecules of co2

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.

What does a numerical subscript following an element in a chemical formula mean?