Structure 3.1

Metal and non metal oxides

Define oxides

chemical compounds with one or more oxygen atoms chemically combines with another element

Examples of oxides

• Iron (III) (rust)

• Silicon dioxide (primary component of sand)

• zinc oxide

• carbon dioxide

• sulfur dioxide

ionic and covalent property in period 3 oxides

• towards left, ionic property ↑

• towards right, covalent property ↑

Define metal oxide/ basic oxide

compounds consisting of a metal ion and at least one oxygen ion; usually solid

State what happens if you put a metal oxide in litmus paper

turns blue; its a basic solution

Define non-metal oxide

compounds consisting of a non-metal atom and at least one oxygen atom; usually gaseous

Rain formula

CO₂ + H₂CO₃→ HCO^- AGAIN

Acid Rain pH

pH<5.6

Explain why acid rain occurs

presence of sulfur and nitrogen oxides

Define oxidation states

number assigned to an atom to shwo the mumber of electrons transferred in forming a bond.

Define oxidation

• addition of oxygen

• removal of hydrogen

• electron loss

• an increase in oxidation states