Give the number of particles of each element in na2so4, sodium sulfate, a drying agent.

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

Avariable that is not being directly tested during an experiment should be

Ajet plane is speeding down the runway during takeoff. air resistance is not negligible. identify the forces on the jet.