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Chapter 3
| Term | Definition |
|---|---|
| Matter | everything that has mass and takes up space |
| Element | the ingredients that make up all other substances. Can't be broken down into other substances |
| Metals | good conductors of electricity and heat. Can bend without breaking. Most have a gray color |
| Nonmetals | do not conduct heat and electricity very well. May be a gas or solid |
| Semimetals | sometimes like metals and sometimes like nonmetals |
| Atom | the smallest part of an element that still acts like that element |
| Atomic Theory | states that everything is made of atoms |
| Compound | a type of matter made of two or more elements |
| Molecule | 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. Found on the outside of the nucleus |
| 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 not 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:
SKROHN72
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