Atoms Elements Compounds Mixtures @ AJHS NZ
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| alloy | A mixture of different metals.
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| atom | The smallest part of an element you can get.
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| boiling point | When a liquid is at its boiling point it is as hot as it can get. It is evaporating as fast as it can.
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| bond | Force holding atoms together.
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| calcium | A metal which reacts easily with water.
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| chemical formula | A combination of symbols and numbers that shows how many atoms of different kinds there are in a particular molecule. In compounds that do not form molecules, it shows the ratio of elements in the compound.
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| chromatography | Separating dissolved solids from one another. The solids are usually coloured.
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| compounds | Substances that can be split up into simpler substances.
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| decompose | Break down into simpler parts.
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| distillation | Separating a liquid from a solution by evaporating the liquid and then condensing it.
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| electrical conductor | Something which allows electricity to flow through it easily.
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| element | All the atoms in an element are the same. A substance that cannot be split up into anything simpler by chemical reactions.
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| evaporate | When a liquid turns into a gas.
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| freezing point | The temperature at which a liquid turns into a solid.
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| heat conductor | Something which allows heat to flow through it easily.
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| high melting point | Something with a high melting point has to be at a very high temperature before it melts. It is a solid at room temperature.
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| irreversible change | Permanent change.
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| low boiling point | Something with a low boiling point will turn into a gas at a relatively low temperature. It can be a solid, liquid or gas at room temperature.
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| magnetic | A metal (iron, nickel or cobalt) that can be magnetised or attracted to a magnet.
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| melting point | The temperature at which a solid turns into a liquid.
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| metals | Elements that are shiny, conduct heat and electricity well, and often have high melting and boiling points.
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| mixture | Two or more different kinds of particles that are not chemically joined to each other.
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| molecule | Two or more atoms joined together.
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| non-metals | Elements that are not shiny, and do not conduct heat and electricity well.
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| oxide | A compound that includes oxygen.
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| Periodic Table | Table that shows all the elements.
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| physical change | A change where no new substances are formed.
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| potassium | Soft, shiny, reactive, silver-coloured metal.
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| precipitate | Insoluble solid produced by mixing two solutions.
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| product | New chemical formed in a chemical reaction.
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| properties | Ways of describing a substance.
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| pure | A substance that does not have anything else in it.
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| reactants | Chemicals that join together to form a new substance.
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| shiny | Reflects light well.
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| sodium chloride | Chemical name for common salt.
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| sulphur | A yellow, non-metal element. Solid at room temperature
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| symbol equation | A way of writing out what happens in a chemical reaction using the symbols that represent the substances involved.
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| symbol | The letter or letters that represent an element.
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