[عاطف خليفة]

* 6- Acidic and basic properties

Acid

Non-metal oxide dissolves in water forming acid

Alkali

Metal oxide soluble in water forming alkali

Notes

1) Acid reacts with alkali forming salt and Water

2) Some oxides can react with both acids and
alkalis so they are called” Amphoteric oxides ”

Ex:

Al2O3

A)In period

-As the atomic number increases the basic properity decreases while the acidic property increases.

In groups

- The basic and acidic properties are both increase when the atomic numbers increase ( moves down )

- The strongest bases at the end left of the table

- The strongest acids at the end right of the table..