Naming Compounds

Ionic and Covalent

First thing first…

Determine if the compound is Ionic or Covalent.

Ionic = Metal + Nonmetal Covalent = Nonmetal + Nonmetal

Metal vs Nonmetal

Nonmetals

Metals

Metal vs Nonmetal

Nonmetals

Metals

Metal vs Nonmetal

Nonmetals

Metals

Metalloids

Ionic: Binary (2 elements)

Positive ion + Negative ion Change ending to “ide”

Ionic Naming

Subscripts have no affect on the name.

Example: NaCl = Sodium Chloride CaCl2 = Calcium Chloride

Transition Metals

Roman Numerals are used to indicate the CHARGE of transition metals. 1 I

2 II3 III4 IV5 V6 VI7 VII8 VIII9 IX10 X

Transition Metal Example

Nickel (III) Sulfide

Charge of Nickel (+3)

Charge of Sulfur (-2)

+3 -2

Ni2S3

Polyatomic ions

An ion containing more than one atom.

Polyatomic ion Families

Common Polyatomic Ions NH4

+ ammonium CN- cyanide OH- hydroxide NO3

- nitrate NO2

- nitrite SO4

-2 sulfate SO3

-2 sulfite PO4

-3 phosphate ClO3

- chlorate MnO4

- permanganate CO3

- carbonate

Memorizing Polyatomics

OH NO SO CO PO3 4 3 4

-1 -1 -2 -2 -3

hydroxide nitrate sulfate carbonate phosphate

Using polyatomics

Magnesium Phosphate

+2 +3

Mg PO4

Mg3(PO4)2

What to remember about ionic compounds

End in “ide” Transition metals

Roman Numeral indicates charge Polyatomic ions

Try a few Ionic Compounds

K3N __________________

CuOH __________________

FePO4 __________________

MgO __________________

Try it the other way

Vanadium (III) sulfide _______

Manganese (II) phosphate _______

Sodium oxide _______

Lithium Fluroide _______

Covalent Naming

Know your prefixes

1 Mono2 Di3 Tri4 Tetra5 Penta6 Hexa7 Hepta8 Octa9 Nona10 Deca

Use the prefixes

The prefix indicates the number of atoms of the element

Change the ending of the second compound to “ide”

diphosphorous trioxide

Ends in “ide”

2 Phosphorous atoms 3 Oxygen atoms

Use the prefixes

If the first element is singular do not use the mono prefix.

Carbon dioxide

Ends in “ide”

1 Carbon atoms 2 Oxygen atoms

Use the prefixes

If the second element is singular you must use the mono prefix.

Carbon monoxide

Ends in “ide”

1 Carbon atoms 1 Oxygen atom

Try a few Covalent Compounds

NF3 ___________________________

Si2Br6 ___________________________

N2O3 ___________________________

ClO2 ___________________________

CF4 ___________________________

Try it the other way now

Hexaboron Silicide ______________

Dihydrogen monoxide ______________

Iodine pentafluoride ______________

Phorsphorous triiodide ______________

Carbon tetrachloride ______________

YAY!

You are now an expert at naming compounds