Can water lakes and rivers evaporate

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.

What are the first three quantum numbers for the electrons located in subshell 2s?

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.