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Ch 3
Structure of Matter voc.
| Question | Answer |
|---|---|
| molecule | the smallest particle of a substance that has the same properties as the substance |
| solid | a form of matter that has a definite shape and volume |
| liquid | a form of matter that has a definite volume, but no definite shape |
| gas | a form of matter that has no definite shape or volume |
| state of matter | the form that matter has - solid, liquid,gas |
| plasma | a very hot gas made of particle that have an electric charge |
| element | matter that has only one kind of atom |
| natural element | an element found in nature |
| compound | a substance that is formed when atoms of two or more elements join together |
| model | a picture, an idea, or an object that is built to explain how something else looks or works |
| nucleus | the central part of an atom |
| proton | a tiny particle in the nucleus of an atom |
| electron | a tiny particle of an atom that moves around the nucleus |
| neutron | a tiny particle in the nucleus of an atom that is similar to a proton in size |
| atomic number | a number equal to the number of protons in the nucleus of an atom |
| mass number | a number equal to the sum of the numbers of protons and neutrons in an atom of an element |
| atom | the building block of matter |
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