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science ch-1 sect-2
| Question | Answer |
|---|---|
| matter | is any thing that has mass and takes up space |
| chemistry | is the study of properties of matter and how matter changes |
| substance | is a single kind of matter that is pure, meaning it always has a specific make-up or composition and a specific set of properties. |
| physical property | is a characteristic of a pure substance that can be observed with out changing it into another substance. |
| chemical property | is a characteristic of a pure substance that describes its ability to change into different substances. |
| element | is a pure substance that can not be broken down into any other substances by chemical or physical means. |
| atom | is the basic particle from which all elements are made |
| chemical bond | is a froce of attraction between two atoms |
| molecule | groups of 2 or more atoms held together by chemical bonds |
| compound | a pure substance made of 2 or more elements chemically combined in a set ratio. |
| chemical formula | which shows the elements in the compound and the ratio of atoms. |
| mixture | is made of two or more substances-elements, compounds, or both that are together in the same place but are not chemically combined. |
| heterogeneous | u can see different mixtures |
| homogeneous | when you cant see the differnt mixtures |
| solution | a mixture of homogeneous mixture |
Created by:
spunkey123