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Elements make compounds. Substances Miss Doig. Explosive experiment . Goggles, bench mat, tongs, bunsen, lighter and magnesium. CAREFULLY put magnesium in flame. Making a compound. What energy is being released? When magnesium is burned, energy is released as light.

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Elements make compounds

Elements make compounds

Substances

Miss Doig


Explosive experiment
Explosive experiment

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

  • CAREFULLY put magnesium in flame.


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.


Elements make compounds1
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?


Naming compounds

Naming Compounds

Substances


Elements and symbols that you should know

Elements and symbols that you should know:

  • Oxygen

  • Fluorine

  • Neon

  • Magnesium

  • Aluminium

  • Silicon

  • Phosphorus

O

F

Ne

Mg

Al

Si

P

  • Hydrogen

  • Helium

  • Lithium

  • Beryllium

  • Boron

  • Carbon

  • Nitrogen

H

He

Li

Be

B

C

N


These elements always go around in pairs. For example, hydrogen looks like this:

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

.e.g. oxygen + oxygen  oxygen


When two elements join the name ends with ____ide

e.g. Magnesium + oxygen magnesium oxide


When three or more elements combine and one of them is oxygen the ending is _____ite or ________ate

e.g. Copper + sulphur + oxygen Copper sulphate

  • Calcium + carbon + oxygen

  • Potassium + carbon + oxygen

  • Sodium + sulphur + oxygen


This powerpoint was kindly donated to oxygen the ending is _____ite or www.worldofteaching.com

http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.


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