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14 terms

Chemical Reactions Vocabulary

the study of the properties of matter and how matter changes
physical changes
changes that alter the form or appearance of a material but not a new substance
chemical changes
a change to matter that produces a new substance with new properties
the smallest particle of an element
the combination of two or more bonded atoms
chemical bond
the force that holds atoms together
chemical equation
a short, easy way to show a chemical reaction, using symbols instead of words
chemical symbols
represent elements using one or two letters
chemical formula
shows the ratio of elements in the compound
shows the number of atoms of an element in one molecule of a substance
the materials you have at the beginning of a reaction
the materials you have at the end of a reaction
arrow in a reaction which means "produces"
law of conservation of mass or matter
during a chemical reaction, matter is not created or destroyed; it is only changed