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Chapter 7 - Part 1
Introduction to Matter - Gr. 6
Term | Definition |
---|---|
matter | anything that has mass and takes up space |
chemistry | the study of the properties of matter and how it changes |
substance | a single kind of matter that is pure and has a specific set of properties |
physical property | a characteristic of a pure substance that can be observed without changing it into another substance |
chemical property | a characteristic of a substance that describes its ability to change into different substances |
element | a pure substance that cannot be broken down into other substances by chemical or physical means |
atom | the basic particle from which all elements are made; the smallest particle of an element that has the properties of that element |
chemical bond | the force of attraction that hold two atoms together |
molecule | a neutral group of two or more atoms held together by covalent bonds |
compound | a substance made of two or more elements chemically combined in a specific ratio, or proportion |
chemical formula | symbols that show the elements in a compound and the ratio of atoms |
mixture | two or more substances that are together in the same place but their atoms are not chemically bonded |