Which statement accurately compares the trends in atomic number and atomic mass in the periodic table

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.

The number of neutrons is equal to the atomic number minus the atomic mass. a. true b. false

According to le chatelier’s principle, a system in chemical equilibrium responds to stress by shifting the equilibrium in a direction that reduces the stress. normalizes the stress. increases the stress. changes the stress.