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Year 7 Chemical Reactions
Terms in this set (19)
A change that produces new substances.
A change that affects the appearance but not the chemical makeup of a substance.
a chemical substance that is present at the start of a chemical reaction
a chemical substance that is produced through a chemical reaction
the force that holds atoms together in a molecule
(physics and chemistry) the smallest component of an element having the chemical properties of the element
smallest unit of most compounds
a pure substance made of only one kind of atom
elements or compounds in the same place but not chemically bonded together
two or more elements that are chemically combined
a lit splint goes out with a squeaky pop
carbon dioxide test
lime water turns cloudy
cobalt chloride paper
turns from blue to pink when water is present
a substance which contains hydrogen and is very reactive
a substance which turns indicator deep blue/purple
changes colour depending on the pH of the substance
indicator turns pink in alkaline solutions
1 to 14, acid to alkal
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