Topic 1 - Chemical Reactions
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In all new chemical reactions one or more _____ substances are formed?
How do you identify a chemical reaction?
- An energy change
- A change of colour
- A gas produced
- A solid (precipitate) formed when two solutions are mixed
What is the simplest chemical substance?
Elements ______ be broken down into anything simpler?
Elements contain only one type of ____ ?
What is formed when elements join together?
What can elements be represented by?
A chemical symbol
What are formed when two substances come together without reacting?
Are new substances formed in mixtures?
A solution is formed when a ______ dissolves in a ______?
What is the insoluble solid formed when two solutions are mixed called?
What is a precipitate reaction?
A reaction in which an insoluble solid is formed when two solutions are mixed
How can an insoluble solid be separated from a solution?
A reaction in which energy is given out is said to be ________?
A reaction in which energy is taken in is said to be
Compounds containing only two elements have names ending in....?
Compounds containing three or more elements, one of which is oxygen, have a name ending in....?
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