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Year 8 HWK 1

Year 8 Acids and alkalis Homework

TermDefinition
What all substances are made up of, and which contain only one type of atom. Element
What is the smallest particle of an element that can exist? Atom
What are two to thousands of atoms joined together called? Molecule
What is the name of a pure substance made up of two or more elements strongly joined together? Compound
What can be used to show the elements present in a compound and their relative proportions. Chemical formulae
What is the name of substances that react together, shown before the arrow in an equation? Reactants
What are the names of the substances formed in a chemical reaction, shown after the reaction arrow in an equation? Products
What is the name of the scale of acidity and alkalinity from 0 to 14? pH
What are the names of substances used to identify whether unknown solutions are acidic or alkaline? Indicators
What is the name of a substance that neutralises an acid – those that dissolve in water are called alkalis? Base
What is the name given to the measurement of the number of particles in a given volume? Concentration
Created by: Windypicks
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