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MJHS7 Chemistry
MJHS7 Chemistry Vocabulary
Question | Answer |
---|---|
Change in matter that produces a new substance | Chemical change |
Smallest particle of an element | Atom |
Combination of two or more atoms | Molecule |
Chemicals listed on the right of the arrow in a chemical equation | Products |
Chemicals listed on the left of the arrow in a chemical equation | Reactants |
Properties of a substance that occur when it chemically changes (reactivity, flammability) | Chemical properties |
Properties of a pure substance (element) that do not change (melting point, boiling point, density, color, state of matter, pH) | Physical properties |
Substance that cannot be broken down into any smaller substance | Element |
Made from two or more pure substances in the same place but not combined into a new material | Mixture |
Measure of the concentration of hydrogen ions (H+) in a solution | pH |
Electrons found in the outer shell of an atom | Valence electrons |
Substance made of two or more elements chemically combined in a specific ratio | Compound |
Chart containing the elements found on Earth; arranged in periods (rows) and groups/families (columns) | Periodic table of the elements |
Change that alters the form or appearance of a material but does not make the material into a new substance | Physical change |