Write formulas for the following compounds consisting of two non-metals or a metalloid and a non-metal.
(1)- hydrochloric acid
(2) hydro-sulfuric acid
(3)-hydro-iodic acid
(4)- silicon tetrafluoride
(5)-arsenic penta-fluoride
(6)-xenon hexafluoride
(7)-iodine penta-fluoride
(8)-krypton difluoride
(9)-tetra-sulfur tetra-nitride
(10)-dichlorine hepta-oxide
(11)-phosphorus trihydride (phosphine)
(12)- tetra-phosphorus decoxide

The characteristics of two different types of reactions are shown below: reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.