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Unit2Chemistry terms

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A	B
alloy	mixture of metals
atomic number	number of protons
mass number	protons + neutrons
element	made from one type of atom
compound	2 or more elements chemically joined
shared electrons	co-valent bond
lose/gain electrons	ionic bond
test for carbon dioxide	turn limewater cloudy
hydrocarbon	made of only hydrogen & carbon
acid + alkali	neutralisation reaction
fuel + oxygen	combustion reaction
thermal energy released	exothermic reaction
mixture	substances not chemically joined
full electron shells	2.8.8
negative part of atom	electron
positive part of atom	proton
test for pH	universal indicator
soild made when 2 liquids react	precipitation reaction
splitting of compound electrically	electrolysis
three states of matter	solid,liquid,gas

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