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C

cation

positively charged atom or molecule (contains fewer electrons than protons)

Celsius

unit of temperature; water freezes at 0°C and boils at 100 °C on this scale

chalcogen

element in group 16

chemical change

change producing a different kind of matter from the original kind of matter

chemical property

behavior that is related to the change of one kind of matter into another kind of matter

chemical symbol

one-, two-, or three-letter abbreviation used to represent an element or its atoms

chemistry

study of the composition, properties, and interactions of matter

compound

pure substance that can be decomposed into two or more elements

covalent bond

attractive force between the nuclei of a molecule’s atoms and pairs of electrons between the atoms

covalent compound

composed of molecules formed by atoms of two or more different elements

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