| Term | Definition |
|---|
| compound | substance formed of atoms from two or more elements |
| electron | negatively charged subatomic particle |
| gas | state of matter with no definite shape or volume |
| atom | smallest unit of a pure substance that still has all the properties of the substance |
| liquid | state of matter that has definite volume but no definite shape |
| acid | substance with a pH less than 7 |
| neutron | subatomic particle with no electric charge |
| solid | substance with a definite shape and volume |
| atomic number | number of protons in an atom |
| proton | subatomic particle with a positive charge |
| base | substance with a pH greater than 7 |
| nucleus | center of an atom, surrounded by a cloud of electrons |
| metals | elements that conduct heat and electricity |
| nonmetals | elements that do not conduct electricity an dis not shiny or malleable |
| periodic table | a table of elements arranged according to their atomic number |
| element | a pure substance that is made up on only one kind of atom |
| malleability | the ability to be bent |
| plasma | a gas that contains charged ions and can conduct electricity |
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