Making and naming compounds

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1

Slide 1

Elements make compounds

Substances

Miss Doig

Slide 2

Explosive experiment

Goggles, bench mat, tongs, bunsen, lighter and magnesium.

CAREFULLY put magnesium in flame.

Slide 3

Making a compound

What energy is being released?

When magnesium is burned, energy is released as light.

Is there a new substance being formed?

A new substance forms, it is white.

Is this new substance lighter or heavier?

-This new substance is heavier as there are two different elements in the substance, they are magnesium and oxygen.

Slide 4

Elements make compounds

When elements join to make a compound, energy is released and a new substance is formed.

A word which means ‘energy released’ is exothermic.

What do you think endothermic means?

Slide 5

Naming Compounds

Substances

Slide 6

Elements and symbols that you should know:

Hydrogen

Helium

Lithium

Beryllium

Boron

Carbon

Nitrogen

Oxygen

Fluorine

Neon

Magnesium

Aluminium

Silicon

Phosphorus

H

He

Li

Be

B

C

N

O

F

Ne

Mg

Al

Si

P

Slide 7

If two identical elements combine then the name doesn’t change.

.e.g. oxygen + oxygen  oxygen

Slide 8

When two elements join the name ends with ide

e.g. Magnesium + oxygen magnesium oxide

Slide 9