KS3 Y8 Matter

Gap-fill exercise

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!
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Substances that cannot be into any simpler substances are called .

There was a time when people studied chemicals to try to make gold. They were called .

It was really when Alessandro invented the first that electricity was used to split up chemicals.

Use of electric current made it possible for the discovery of reactive metals like , so, um and ium.

We now know of different . These are arranged in a . Most of these elements are either or s. These can be in many ways like letters used in creating words.

Elements are made up of called . Normally you cannot divide it any smaller. are thus the smallest particle known. The greek word for indivisible is .

When two are mixed together they form a . Mixtures of metals are called .

Each element has a name and a symbol. The symbol is usually the first letter of the name. The symbol for carbon is and for it is O. The symbol for is Cu. As the letter C is used the second letter written in lower case is used to help distinguish copper from carbon.

 

 

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