On the PeriodicTable ,the number of protons in an atom of an element is indicated by its

June 2017 NY Regents Chemistry Exam

6 On the PeriodicTable ,the number of protons in an atom of an element is indicated by its (1) atomic mass (2) atomic number (3) selected oxidation states (4) number of valence electrons

Solution: Atomic number is equal to the number of protons in an atom of an element.