Elements are building blocks from which everything in the universe is made of.
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How many elements are there?
There are over 100 elements.
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How are all the elements organised?
Elements are listed on the periodic table.
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Elements and symbols.
Each element has it's own symbol eg. Au which is the symbol for Gold
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What do elements contain and what are called.
Elements contain particles and they are called atoms.
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How many different kinds of atom does each element contain?
Each element contains only one kind of atom.
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Name the three different states that elements can be in at room temperature.
The main three sates are solid, liquid and gas. (room temperature is about 20 degrees C)
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Name the two elements that are liquid at room temperature.
The only two elements that are liquid at room temperature are the metal called mercury and the non-metal bromine.
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What are the two types of elements?
The two types are metals and non-metals.
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What is the only non-metal that does conduct electricity?
Carbon in its graphite form.
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What is not a good way to tell the difference between metals and non-metals?
Magnetism. Because not all metals are magnetic.
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What is sulphur at room temperature and is it a metal?
Sulphur is a non-metal and is a yellow solid at room temperature.
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What colour is oxygen and what state is it in?
Oxygen is a colourless gas and is a non-metal
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What is a compound?
A compound is a substance that is made from more than one kind of atom joined together.
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What happens when a chemical reaction takes place?
A new substance is always formed.
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What is formed when elements react together?
A compound is formed when elements react together.
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Does a compound behave like the elements it is formed by?
No. It contains different properties.
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What are key signs of a chemical reaction?
Bubbles (gas), an energy change, colour change, a precipitate (solid) forms in solution.
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how would you name copper and chlorine in a compound?
Copper chloride. This because there are two elements so it ends with IDE and the metal part comes first.
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Compounds can be represented by a chemical formula. What is a chemical formula
a chemical formula shows you what elements are in the compound and how many of each element there are in the compound. For example sodium chloride has sodium and chlorine.
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How can compounds be split up into their elements?
Compounds can be split up into their elements using electricity.
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