An ion has a mass number of 208 and an atomic number of 82, hov many electrons does it have if the lon has a+4 charge 126 electrons 2 electrons 78 electrons ctrons

Element Atomic Number Mass Number Number of Protons Number of Neutrons Number of Electrons Ge Si Ni 29 35 225 89 isotope Atomic Number Mass Number Number of Protons Number of Neutrons Number of Electrons He 92 25 17

Classify each of the following as a metal, nonmetal, or metalloid.   arsenic argon calcium plutonium

All of the following statements are true EXCEPT: isotopes of an element have the same atomic number. for any neutral element, the number of protons and electrons are equal. all atoms of a given element have the same mass number. the atomic number equals the number of protons. the mass number is the sum of the number of protons and neutrons.