Physical Science Chapter 2 Section 1

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atom

compound

element

matter

molecule

pure substance

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a particle consisting of two or more atoms chemically tied together

a substance of constant composition that possesses definite qualities

anything that has mass and takes up space

a pure substance that can't be broken down into simpler substances by physical or chemical means

the smallest particle into which an element can be divided and still be the same substance

a pure substance consisting of atoms of two or more elements that are chemically combined in a fixed proportion


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