Element x has two isotopes. the table gives information about these isotopes. isotope atomic mass (amu) abundance (%) x-63 62.9296 69.15 x-65 64.9278 30.85 the average atomic mass of element x is amu.

The characteristic 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 and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.