NOMENCLATURE

Binary Molecular Compounds

Periodic Table

Ionic Vs. Covalent

SO3

Al2O3

NaCl

S2Cl2

N2F2

CaF2

ActivityBinary Molecular Compound Binary Ionic Compound

Prefix Chartmono 1

di 2

tri 3

tetra 4

penta 5

hexa 6

hepta 7

octa 8

nona 9

deca 10

Naming from the formula

Write the name of the first element. Write the name of the second element. Change the ending of the second element to

"IDE"

Put the correct prefix in front of each element to tell how many atoms of that element are in the molecule.

Carbon Oxygenoxidedi

Naming from the Formula

• Only use “mono” for the second element

• “ide” still only used for second element• CO2 = carbon dioxide; NOT

monocarbon dioxide. • H2O = dihydrogen monoxide

Try it

• SO2

• NH3

• N2H4

• CCl4• NO

Naming the formula from the name:

Dinitrogen monoxide Write the symbol of the first element. Write the symbol of the second element. Use the prefix in the name to acquire the correct subscript.

dinitrogen monoxide

N ON2O

Try it

• Diarsenic trioxide• Phosphorus trichloride• Sulfur dibromide• Chlorine trifluoride• Carbon monoxide

Assessment

1. Name the compound CCl4

2. Name the compound CO

3. Write the formula for tetraphosphorus decaoxide

4. Write the formula for sulphur trioxide