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B2 Ch 1 Lesson 2
Classifying Matter
Term | Definition |
---|---|
Element | A substance that cannot be broken down into any other substance 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 holds 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. |