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“We must trust to nothing but facts: These are presented to us by Nature, and cannot deceive. We ought, in every instance, to submit our reasoning to the test of experiment, and never to search for truth but by the natural road of experiment and observation.” ― Antoine Lavoisier, Elements of Chemistry

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c h e m i s t r y 4 u s

The science of today is the technology of tomorrow, Edward Teller

c h e m i s t r y 4 u s

Success is no accident. It is hard work, perseverance, learning, studying, sacrifice and most of all, love of what you are doing or learning to do. Pele

c h e m i s t r y 4 u s

Optimism is the faith that leads to achievement. Nothing can be done without hope and confidence. Helen Keller

c h e m i s t r y 4 u s

Science without religion is lame, religion without science is blind. Albert Einstein

c h e m i s t r y 4 u s

Insanity: doing the same thing over and over again and expecting different results. Albert Einstein

Friday, 26 September 2014

Chemical Bonding Worksheet

Do these following questions in your exercise book. Submit it on Thursday October 2, 2014


1. What type of bond would be found between the following pairs of elements?
     (a) sulfur and chlorine
     (b) carbon and oxygen
     (c) magnesium and nitrogen
     (d) zinc and copper
2. what force holds the sodium and chlorine together in sodium chloride?
3. Draw diagrams of the covalent bonding in the following elements and compounds (show the outer electrons only in your diagram)
    (a) hydrogen
    (b) fluorine gas
    (c) water
4. Draw diagrams the ionic bonding in the following compounds
    (a) lithium fluoride
    (b) barium oxide
    (c) aluminum chloride

Tuesday, 9 September 2014