2.3 Formulas (Rules)

There are two types of ions, they are…

cations

anions

In an ionic compound, the positively charged cations and the negatively charged anions cancels out each other charges. The total charge of an ionic compound is…

zero

We can identify the charges of ions of an element from their ——

position in the Periodic table

Alkali metals, Alkaline Earth metals and other metals are all —- charged ions

positively

State the charge for group 1,2 and 13 elements

1: +1

2: +2

13: +3

Transition elements can have different —- charges

positive

Group 15,16 and 17 elements produce —- charged ions.

negatively

Group 18 elements are inert. Which means they have —— at all.

no charge