Natrual science

METALS AND OXYGEN

"Some metals react with oxygen during burning. This is called

COMBUSTION.

• When a substance reacts with oxygen - a product called an OXIDE is formed.

• METAL + OXYGEN • METAL OXIDE

• E.g. SODIUM + OXYGEN •

• E.g
  IRON + OXYGEN O

(Iron oxide = RUST)

METALS BURNING IN OXYGEN

• SODIUM BURNS WITH A BRIGHT YELLOW FLAME IN OXYGEN

• POTASSIUM BURNS WITH A BRIGHT LIGHT

• MAGNESIUM BURNS WITH A BLINDING WHITE LIGHT.

WORD AND CHEMICAL EQUATIONS

-MAGNESIUM + OXYGEN • MAGNESIUM

OXIDE

"Mg + 02

Mgo

•2Mg + 02 • 2MgO

• Some metals react with oxygen during burning. This is called COMBUSTION.

• When a substance reacts with oxygen - a product called an OXIDE is formed.

• METAL + OXYGEN • METAL OXIDE

• E.g. SODIUM + OXYGEN •

• E.g
  IRON + OXYGEN O

(Iron oxide = RUST)

42,

4 of 5

METALS BURNING IN OXYGEN

• SODIUM BURNS WITH A BRIGHT YELLOW FLAME IN OXYGEN

• POTASSIUM BURNS WITH A BRIGHT LIGHT

• MAGNESIUM BURNS WITH A BLINDING WHITE LIGHT.

WORD AND CHEMICAL EQUATIONS

•MAGNESIUM + OXYGEN • MAGNESIUM

OXIDE

• Mg + 02 0 MgO

• 2Mg + 02 • 2MgO

RUST

• Rusting is a type of CORROSION. Corrosion weakens and damages metal.

• RUSTING: A slow chemical reaction of iron with oxygen in the air, in the presence of water.

• Do you think that things rust faster in Cape Town or Gauteng?

•Materials are made up of elements.

•All elements are indicated on the Periodic Table.

•Horizontal rows are known as periods on the Periodic Table

•Vertical columns are known as groups on the Periodic Table

The Atom

• All matter is made up of tiny particles called atoms

• Atoms are made up of 3 basic particles, namely:
  Protons (positive charge) - in nucleus
  Neutrons (no charge) - in nucleus
  Electrons (negative charge)

Element

• Consists of one type of atom

• Each atom has a certain number of neutrons, protons and electrons.

• An element is the simplest him form of matter

• you cannot break it down into simpler substances.

•