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DAVID

Across
Matter consisting of two or more pure substances that retain their individual identities and can be separated by physical methods
Mixture having a uniform composition and properties throughout
Matter having an invariant chemical composition and distinct properties
Substance composed of two or more elements in fixed proportions can be separated into simpler substances and elements only by chemical methods
Ions are electrically charged atoms or groups of atoms
Down
Mixture not uniform in composition and properties throughout
Occupies space and possess mass; may exist as solid, liquid ,or gas
Cannot be into simpler substances by chemical methods