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KS3 Chemistry vocab

Common Entrance (KS3) Chemistry vocabulary

NEUTRAL A liquid with a pH value equal to pH7.
ACID A liquid with a pH value less than pH7.
ALKALI A liquid with a pH value greater than pH7.
ALUMINIUM A very light metal used to make kitchen foil and saucepans.
ATOM The smallest possible part of a element.
BUNSEN BURNER A piece of apparatus that burns gas and is used to heat apparatus.
CHROMATOGRAPHY A way of separating a mixture of coloured dyes or pigments such as found in ink.
COMPOUND The substance formed when two or more elements are chemically combined together. eg HYDROGEN (element) + OXYGEN (element) = WATER
CONDENSE (condensation) This is what happens when a gas turns to a liquid due to being cooled down. For example when steam touches a cold mirror.
COPPER A pink metallic element. It is a very good conductor of heat and electricity. It is the metal that wires are usually made from.
DECOMPOSE (decomposition) The chemical change that takes place when a compound is split apart into two (or more) simpler substances, usually by heating.
DISTILLATION The name of the process used for obtaining the SOLVENT from a SOLUTION. Eg obtaining pure water from sea water.
ELEMENT Chemical substances that contain only one kind of atom. They are listed in the Periodic Table.
EVAPORATION The process for obtaining the solute from a solution by warming the solution and letting the solvent evaporate away.
FILTRATION The process used for separating a SOLID from a LIQUID. Eg removing dirt from water
GRAPHITE A form of carbon. The black substance inside pencils (the pencil lead).
IMMISCIBLE Two liquids that will not mix together (like oil and water)
INSOLUBLE When a substance cannot dissolve.
MALLEABLE A substance that can be hammered into thin sheets. Includes most metals. Good examples are gold, copper or lead.
MIXTURE Something that contains at least two substances that can be separated without a chemical reaction taking place.
MOLECULE . The particle formed when two or more atoms chemically join together.
pH SCALE A scale of numbers (from 1 to 14)which shows how acidic or alkaline a liquid is.
REDUCE (reduction) The kind of reaction happens when we remove the oxygen from a compound.
RESIDUE The solid remaining in the filter paper after filtering.
SOLID A solid is one of the three states of matter (the other two being liquids and gases).
SOLUBLE This is how we describe a substance that can be dissolved. Sugar is soluble in water.
SOLUTE The solid that has been dissolved when we make a solution.
SOLUTION This is the liquid obtained by dissolving one substance in another.
STATES OF MATTER SOLID, LIQUID and GAS are known as this.
FILTRATE The liquid left behind after filtering.
REDUCING AGENT An element good at removing oxygen from a compound. (Eg magnesium)
SOLVENT A liquid good at dissolving things
OXIDISE A kind of reaction when oxygen comines with another element.