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chemical reaction

Across
a reaction of a substance with oxygen to give heat and light
AB ---> A + B ; a reaction in which a single compound breaks down to form two or more simpler substances
substances produced in a chemical reaction
substance that initiates or accelerates a chemical reaction
the temperature at which a liquid boils at sea level
A + B ----> AB, a reaction in which two or more substances combine to form a new compound
Down
a chemical reaction accompanied by the evolution of heat
a chemical reaction accompanied by the absorption of heat
number which tells how many atoms of an element are in a molecule or compound; written on or below the line; not changed in balancing an equation
the temperature below which a liquid turns into a solid