# Naming Compounds and Finding Formulas

HideShow resource information
• Created by: joshd
• Created on: 30-03-14 11:01
What is Rule 1 of naming compounds? Give an example.
When two different elements combine the compound's name is 'something -IDE'. (e.g, if sodium and chlorine combine = sodium chloride. Magnesium and oxygen = magnesium oxide).
1 of 7
What is Rule 2 of naming compounds? Give an example.
When three or more different elements combine and one of them is oxygen, the compound's name is often 'something -ATE'. E.g, copper, sulfur and oxygen = copper sulfate. Sodium, nitrogen and oxygen = sodium nitrate)
2 of 7
How can you work out the formula you get when things react?
Look at what ions they form.
3 of 7
What do the charges of the ions in a compound have to do?
Balance.
4 of 7
Give an example of work outing the formula by looking at the charges. (1)
You need 1 hydroxide ion (OH-) to balance the charge of 1 sodium ion (Na+), so the formula for sodium hydroxide would be NaOH.
5 of 7
Give an example of work outing the formula by looking at the charges. (2)
You need 2 chloride ions (Cl-) to balance the charge of 1 magnesium ion (Mg2+), so the formula for magnesium chloride would be MgCl2.
6 of 7
Give an example of work outing the formula by looking at the charges. (3)
You need 1 oxide ion (O2-) to balance the charge of 1 calcium ion (Ca2+), so the formula for calcium oxide would be CaO.
7 of 7

## Other cards in this set

### Card 2

#### Front

What is Rule 2 of naming compounds? Give an example.

#### Back

When three or more different elements combine and one of them is oxygen, the compound's name is often 'something -ATE'. E.g, copper, sulfur and oxygen = copper sulfate. Sodium, nitrogen and oxygen = sodium nitrate)

### Card 3

#### Front

How can you work out the formula you get when things react?

### Card 4

#### Front

What do the charges of the ions in a compound have to do?

### Card 5

#### Front

Give an example of work outing the formula by looking at the charges. (1)