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chapter 3
matter/ elements/ periodic table
| Term | Definition |
|---|---|
| matter | This is anything that takes up space |
| element | basic kinds of matter |
| metal | Good conductors of electricity and heat. Can be handled without breaking. Most have a gray color. |
| nonmetal | Do not conduct heat/ electricity very well. May be a gas or solid. |
| semimetal | sometimes like metals and sometimes like nonmetals. |
| atom | the smallest part of an element that still acts like that element. |
| atomic theory | states everything is made of atoms. |
| proton | Positive charge, found in the nucleus. |
| neutron | No charge, found in the nucleus. |
| electron | Negative charge, orbits the nucleus. |
| compound | A type of matter made of two or more elements. |
| molecule | Smallest part of a compound that still acts like the compound. |
| Solid | Has a definite shape and volume. Particles are very close together, and don’t move past each other. Keeps shape |
| liquid | definite volume but no definite shape, particles can move past each other, takes shape of container |
| gas | No definite volume or shape. Particles spread out evenly and take shape of container. Can be squeezed into smaller volume |
| plasma | Like a gas, but conducts electricity like a metal. Occurs with high temps or electric charge. |
| melting point | When solid to liquid or liquid to solid. Same temp as freezing point. |
| evaporation | When liquids become a gas. |
| condensation | When gas become a liquid. Gas particles touch a cold surface and the temperature drops |
Created by:
madison-whitlock
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