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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 substances |
| Metals | good conductors of electricity and heat. Can bend without breaking. Most have a gray color |
| Nonmetals | do not conduct heat/electricity very well. May be gas or solid |
| Semi-metals (metalloid) | sometimes like metals and sometimes like nonmetals |
| Atom | the smallest part of an element that still acts like an element |
| Atomic Theory | states that everything is made of atoms |
| compound | a type of matter made of two or more elements |
| molecule | smallest particle 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 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 gas. |
| Condensation | When gas become a liquid. Gas particles touch a cold surface and the temp drops |
Created by:
shifa-mazher
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