Calculating Particles for an ion Representations from the

Calculating Particles for an ion

Representations from the Periodic Table Atomic Number Symbol 26 Fe Iron Electron Configuration Electrons/Level 55. 845 2 -8 -14 -2 +2 +3 Oxidation States Name Atomic Mass

Calculating Number of Protons Atomic Number for an atom that is an ion = # of Protons 26 Fe Iron 55. 845 2 -8 -14 -2 +2 +3

Calculating Number of Electrons Atomic Number for an atom that is an ion = # of Protons 26 Fe Iron 55. 845 2 -8 -14 -2 +2 +3 # of electrons = Protons – charge Ex. 26 -(+2) = 24

Calculating Number of Neutrons 26 Neutrons = Mass Number – Atomic Number Fe Iron 55. 845 2 -8 -14 -2 +2 +3 If Most Common Isotope - Round Atomic Mass to nearest whole number so 56 AMU

Calculating Mass Number 26 Fe Iron 55. 845 2 -8 -14 -2 +2 Mass Number = Sum of the protons and +3 neutrons

Isotope Name 26 Fe Iron 55. 845 2 -8 -14 -2 +2 Element Name followed by hyphen and +3 then Mass Number ex. Iron - 56

Isotope Notation 26 Fe Iron 55. 845 2 -8 -14 -2 +2 +3 m X p c m = mass number: # of Protons + Neutrons c = charge of element X = symbol of element p = Atomic Number: # of protons 56 +2 Ex = 26 Fe

Calculating Charge 26 Fe Iron 55. 845 2 -8 -14 -2 +2 +3 Charge = Protons – Electrons Ex. 26 – 24 = +2

Final Answers for Iron Element Isotope Atomic Protons Neutrons Electrons Mass / Name Notation Number (p+) (n 0) (e-) Number Symbol 56 Fe+2 Iron-56 26 26 30 24 56 Fe 26