| A | B |
|---|
| Chemistry | The study of matter and how it changes |
| Compound | a pure substance made of two or more elements bonded together ex. H2O |
| Atom | The smallest particle that has the properties of an element; pure substance |
| Element | a substance that can't be broken into simpler substances but is made of atoms; symbols start with a capital letter |
| Matter | Anything that has mass or takes up space |
| Pressure | The force pushing on a surface divided by the area of that surface (F/A) |
| Melting | phase change of a substance where a solid goes to a liquid |
| Melting Point | temperature that a solid turns into a liquid |
| Sublimation | phase change of a substance from a solid to a gas |
| Condensation | phase change where a substance goes from a gas to a liquid |
| Evaporation | phase change where a substance goes from a liquid to a gas |
| Mixture | A combination of more than one pure substance (can be separated back to original pure substances) |
| Pure Substance | any substance made of only one kind of matter and having definite physical properties |
| Density | mass/volume |
| Physical Property | a characteristic of a substance that can be observed or measured without changing the composition of the substance, ex: density |
| Thermal Energy | Energy of Heat/ the total energy of a substance's particles due to their movement or vibration |
| Phase Changes | evaporation, condensation, sublimation, melting, solidification |
| Phases of Matter | solid, liquid, gas, plasma |
| Solidification | phase change of a substance where a liquid goes to a solid |
| Properties of a Solid | atoms make a pattern, definite shape, definite volume |
| Kinetic Theory | All matter is made of atoms which are always in motion; Increase the temperature, increase the motion of the atom; Increase the size of the atom, decrease the motion |
| Conservation of Energy | energy can not be created or destroyed (just changes forms) |
| Chemical Energy | A form of energy that comes from chemical bonds |
| Physical Change | a change that occurs when a substance changes composition by forming one or more new substances; ex: burning wood |
| Periodic Table: Group | Columns of Periodic Table |
| Periodic Table: Period | Rows of Periodic Table |
| Boiling Point | The temperature at which a liquid turns into a gas |
| Electron (charge & location) | negative charge; found outside nucleus of an atom |
| Parts of an Atom | protons, electron & neutron |
| Properties of a Gas | atoms all over the place, indefinite shape, indefinite volume |
| Properties of a Liquid | atoms are hanging out/not in pattern; indefinite shape, definite volume |
| Chemical Bond | The force that holds two atoms together |
| Proton (charge & location) | positive charge; found in nucleus of an atom |
| Neutron (charge & location) | no charge; found in nucleus of an atom |
| Plasma | A state of matter in which atoms are stripped of their electrons & the nuclei are packed closely together (formed under high temperatures & pressures like in the sun) |
| Nucleus | The central core of an atom containing protons & neutrons |
| Atomic Number | The number of protons in the nucleus of an atom |
