Who up and want talk but u cant be dry

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.

Drag each pressure unit with the corresponding number to describe standard atmospheric pressure

How many moles are equal to 2.4×10^23 formula units of sodium chloride