An atom of a certain element has 28 protons, 28 electrons, and a mass number of 59. How many neutrons are in this atom?

How many orbitals does the p sub shell container

How many liters of hydrogen gas will be produced at stp from the reaction of 7.179×10^23 atoms of magnesium with 54.219g of phosphoric acid (h3po4) the equation is 3mg + 2h3(> mg(po4)2+3h2

Why does ammonia, nh3, behave as a base when it reacts with an acid? z