Naming Summary SNC1D
Use Ionic Naming Rules
i.e. calcium chloride
Is the first
element a
metal?
(no prefixes!)
Use Covalent Rules ‐ the
prefixes
i.e. dihydrogen
monoxide
Ionic Naming Rules:
Writing names: write the name of the metal and the name of the non‐metal with
the ending changed to –ide. Example: Na3P is sodium phosphide
Writing formulas: Write the symbols for each element. Write the charges as
exponents. Do the “criss‐cross” to come up with subscripts (sometimes you have
to reduce them…like in magnesium sulfide).
Examples:
lithium oxide
magnesium sulfide
aluminum oxide
1+ 2‐
2+ 2‐
Li O
Mg S
Al3+O2‐
MgS
Al2O3
Li2O
Covalent/Molecular Naming Rules:
Writing names: use prefixes (no mono‐ on first element), change the ending of the
second element to –ide. Examples: H2O = dihydrogen monoxide, NO2 = nitrogen
dioxide
Writing formulas: Write the symbols for the elements present and use the
prefixes to write the subscripts. Examples: dinitrogen tetraoxide = N2O4
Prefixes – COVALENT ONLY!
1 – mono
2 – di
6 – hexa
7 – hepta
3 – tri
8 – octa
4 – tetra
9 – nona
5 – penta
10 – deca
Name these compounds. They may be either ionic or covalent.
1)
Li2O __________________________________________
2)
PBr3 __________________________________________
3)
Na2S__________________________________________
4)
H2S __________________________________________
5)
CaO __________________________________________
6)
CF4 __________________________________________
7)
Na3N __________________________________________
8)
P2S3 __________________________________________
9)
Al2O3 __________________________________________
10)
MgO __________________________________________
Write the formulas for the following compounds. Remember, they may be either ionic or covalent compounds,
so make sure you use the right method!
11)
potassium oxide __________________________________________
12)
phosphorus tribromide ________________________________________
13)
calcium nitride __________________________________________
14)
dinitrogen monosulfide __________________________________________
15)
carbon monoxide __________________________________________
16)
diboron tetrahydride __________________________________________
17)
phosphorus pentabromide _____________________________________
18)
sulfur dichloride __________________________________________
19)
sodium bromide __________________________________________
20)
aluminum nitride __________________________________________
the following chemical compounds:
1)
NaBr ______________________________________________
2)
CaCl2 ______________________________________________
3)
P2O5 ______________________________________________
4)
K2O ______________________________________________
5)
AlP ______________________________________________
6)
K3N ______________________________________________
7)
SO2 ______________________________________________
8)
CuOH ______________________________________________
9)
ZnO ______________________________________________
10)
V2S3 ______________________________________________
Write the formulas for the following chemical compounds:
11)
silicon dioxide ______________________________________________
12)
rubidium sulfide _____________________________________________
13)
magnesium phosphide _____________________________________
14)
silver iodide ______________________________________________
15)
diboron tetrabromide __________________________________________
16)
magnesium nitride ________________________________
17)
potassium sulfide __________________________________________
18)
barium oxide ____________________________________________
19)
calcium selenide ______________________________________________
20)
carbon tetrachloride __________________________________________