KS3 Y8 Compounds

Gap-fill exercise.

Name:_________________________Class:___________________Date:__________________

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button if available to get a clue. Note that you will lose points if you ask for hints or clues!
   100      2 or more different      6      arranged      carb      chemically combine      compounds      Glucose      H2O      hydrog      hydrogen      join      millions      oxygen      SO2      sulphur      Sulphur dioxide   
Elements together to form . There are about elements and these join together in different ways to form the of different compounds.

So when atoms of elements together they form compounds.

Three examples are listed below.

Water is a compound as it has one atom and two atoms chemically combined. The chemcical formula for water is . The 2 of course written in subscript.

is another compound. It is made up of one atom and two oxygen atoms. The chemical formula is . Again the 2 is writtenin subscript.

is another compound and is made up of on atoms, 12 en atoms and 6 atoms. They are specially combined and .

 

 

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