Lesson 7, Topic 6
In Progress

# Rules for Writing Chemical Formula of Compounds

Lesson Progress
0% Complete

1. Write down the symbol of Elements or radicals

2. Write the Oxidation numbers above and to the right of the symbol or radical

3. Now write the symbols again, reversing the Oxidation numbers and writing the numbers (but not 1) below and to the right of the symbol. Omit the signs.

Let us apply these rules in writing the Chemical formula of sodium tetraoxosulphate(IV)

= Na2SO4

Example II

Write down the molecular formula of the following

1. Sodium trioxonitrate(V)

2. Iron(iii) Chloride

3. Calcium Oxide

4. Potassium tetraoxosulphate(VI)

1. Sodium trioxonitrate(V)

= NaNO3

2. Iron(III) Chloride

= FeCl3

3. Calcium Oxide

=CaO

4. Potassium tetraoxosulphate(VI)

= K2SO4

#### Responses

1. Thank you ,I appreciate
You have really helped me

error: