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science atoms
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| Term | Definition |
|---|---|
| matter | everything that has mass and takes up space |
| element | the ingredients that make up all other substances. they can't be broken down |
| metals | good conductors of electricity and heat. can bend without breaking and most metals have a grayish color |
| nonmetals | they don't conduct heat or electricity very well. may be a gas or a solid. |
| semimetals | sometimes conducts heat and electricity well and sometimes it doesn't. |
| atom | the smallest part of an element that still acts like that element. |
| atomic theory | it proves that everything is made out of atoms. |
| compound | a type of matter made out of two or more elements |
| molecule | the smallest part of a compound that still acts like that compound. |
| proton | positive charge. found in the nucleus. |
| neutron | no charge. found in the nucleus |
| electron | negative charge. orbits around the nucleus |
| solid | has a definite shape and volume. particles are very close together. Takes shape of container |
| liquid | definite volume, but not shape, particles can move past each other, takes shape of container |
| gas | no definite volume or shape, particles spread out easily in container, can |
| plasma | |
| melting point | |
| evaporation | |
| condensation |