As an electron in an atom falls to a lower energy level the energy of the electron
a. decreases b. increases c. remains the same

Predict whether the changes in enthalpy, entropy, and free energy will be positive or negative for the boiling of water, and explain your predictions. how does temperature affect the spontaneity of this process?

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.

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?