An ion of iron has an 26 protons, 30 neutrons, and 23 electrons. what are its atomic number, atomic mass, and net charge?
a. atomic number = 26, atomic mass = 56, net charge = 3+
b. atomic number = 26, atomic mass = 56, net charge = 3-
c. atomic number = 30, atomic mass = 56, net charge = 3+
d. atomic number = 56, atomic mass = 26, net charge = 3-