Physical science Chapter 4
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Created by:
ywillard78 on February 17, 2010
Classes:
Mercy Physical Science 8 Final Exam
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9 terms
Terms | Definitions |
|---|---|
 compound | substance made up of two or more elements that are chemically combined |
| mixture | two or more substances that have been physically combined |
| substance | any element or compound |
| molecule | smallest part of a substance that has all the properties of that substnace |
| chemical bond | force of attraction that holds atoms together |
| valence electron | electron in the outermost energy level of an atom |
| ion | atom with an electrical charge |
| ionic bond | bond formed between atoms that have gained or lost electrons |
| covalent bond | bond formed when atoms share electron |
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