1. Naming Molecular Compounds
Molecular Compound also has common names – Ammonia, Water
Systematic naming – They are composed of two or more non metals
Their names have the form
Prefix
Name of 1st element
Prefix
Base name of 2nd element + -ide

2. Steps
Write the element with the smallest group number first
If the two elements lie in the same group, then write the element with the greatest row number first
Write prefixes to indicate the number of atoms present
If there is only one atom of the first element in the formula, the prefix mono is generally omitted

3. N2O - Dinitrogen Monoxide NI3 PCl5 P4S10 Name the compound N2O5
Examples :
NO Nitrogen dioxide
N2O - Dinitrogen Monoxide
NI3
PCl5
P4S10
Name the compound N2O5
Write the formula for Phosphorus tribromide

4. The compound NCl3 is nitrogen trichloride but AlCl3 is Aluminum chloride

5. HCl is an acid that forms H+ and Cl- ions when dissolved in water
Naming Acids
Acids are molecular compounds that releases hydrogen ions when dissolved in water
HCl is an acid that forms H+ and Cl- ions when dissolved in water
To distinguish between gaseous HCl ( Hydrogen Chloride) and aqueous HCl (Hydrochloric acid) we write HCl(g) for the former and the latter as HCl(aq)

6. Acids
Acids has the ability to dissolve many metals
They have a sour taste
HCl present in stomach fluids
HCl dissolves some metals such as Zn to form Zn2+ cations
Acids can be classified in to two
Binary acids and oxy acids

7. Base name of non-metal + -ic
Binary acids – contains only two elements
Oxy acids contains oxygen
Naming of binary acids - They are composed of H and a non metal and they have the form
acid
Hydro
Base name of non-metal + -ic

8. Examples
HCl
HBr HI HF

9. Base name of oxyanion + -ice Base name of oxyanion + -ous
Naming Oxy acids
Oxyacids contain hydrogen and oxyanion(An anion containing oxygen and a non metal)
Oxyanions ending with - ate
Oxyanion ending with - ite
HNO3 - Nitric Acid
H2SO3 - Sulfurous Acid
Base name of oxyanion + -ice
acid
Base name of oxyanion + -ous
acid

10. Naming Oxyacids
HC2H3O2 (aq)
HNO2 (aq)
Write the formula for per chloric acid

11. Inorganic Nomenclature Flow Chart

12. Use the flow chart to name each compound
SO2
HClO4
CoF2
H2SO3

13. Formula Mass and Mole concept for Compounds
Formula Mass – Average mass of a molecule of a compound( Its also called Molecular mass or molecular weight)
For any compound, the formula mass is the sum of the atomic masses of all the atoms in the chemical formula
Formula mass = (number of atoms of 1st element in chemical formula ×atomic mass of 1st element)+(number of atoms of 2nd element in chemical formula × atomic mass of 2nd element)

14. Formula mass of CO2 and Na2O
Formula mass of CO2 = amu+2(16.00amu) = 44.01amu
Formula mass of Na2O = 2(22.99amu) amu = 61.98amu

15. Calculate the formula mass of Glucose?
Calculate the formula mass of calcium nitrate?

16. Molar mass of a compound
Mass in grams of 1 mole of its molecules or formula units is numerically equivalent to its formula mass
The molar mass of CO2 = 44.01g/mol

17. Calculate the number of CO2 molecules in a sample of dry ice (solid CO2 ) with a mass of 10.8g?