What is the average atomic mass of a sample of naturally occurring x, if it is comprised of the following isotopes 47% ^51x, 17% ^52x and 36% ^56x

Which statement describes james chadwick’s discovery.

Which of the following would have less momentum than a 52 kg cheetah running at 10 m/s?

In the lab, ammonia was mixed with water to form ammonium hydroxide. what is/are the reactant(s)? o water and ammonia o ammonia o ammonium hydroxide need