Calculating Particles for an ion

Representations from the Periodic Table

26 +2

FeIron

55.8452-8-14-2

OxidationStates

Name

Atomic Mass

Atomic Number

Symbol

ElectronConfiguration

Electrons/Level

+3

Calculating Number of Protons

Atomic Number

Atomic Number for an atom that is an ion =

# of Protons

26 +2

FeIron

55.8452-8-14-2

+3

Calculating Number of Electrons

Atomic Number

Atomic Number for an atom that is an ion =

# of Protons

26 +2

FeIron

55.8452-8-14-2

+3# of electrons =

Protons – chargeEx. 26-(+2) = 24

26 +2

FeIron

55.8452-8-14-2

Calculating Number of Neutrons

If Most Common Isotope - Round Atomic Mass to nearest whole

number so 56 AMU

Neutrons = Mass Number – Atomic Number

+3

Calculating Mass Number

Mass Number = Sum of the protons and neutrons

26 +2

FeIron

55.8452-8-14-2

+3

Isotope Name

Element Name followed by hyphen and then Mass Number

ex. Iron - 56

26 +2

FeIron

55.8452-8-14-2

+3

Isotope Notation

Xm

p

m = mass number: # of Protons + Neutrons

p = Atomic Number: # of protons

X = symbol of element

26 +2

FeIron

55.8452-8-14-2

+3

Ex = Fe56

26

cc = charge of element

+2

Calculating Charge

Charge = Protons – ElectronsEx. 26 – 24 = +2

26 +2

FeIron

55.8452-8-14-2

+3

Element/

Symbol

Isotope Name

Isotope Notation

Atomic Number

Protons(p+)

Neutrons(n0)

Electrons(e-)

Mass Number

IronFe

Iron-56 56 Fe+2

2626 26 30 24 56

Final Answers for Iron