| A | B |
|---|
| matter | Anything that has mass and a volume. |
| atoms | The building blocks of matter. Made up of protons, electrons, and neutrons. |
| molecules | Two or more atoms are joined together chemically. Elements can be different or the same. Example: O + O = O2 |
| compound | A molecule that has two or more different elements bonded together. Example: H and O=H2O |
| heterogeneous | Parts do not combine completely or evenly. Example: sand and water |
| homogeneous | Uniform distribution. Example: sugar in water |
| mixture | No chemical change. Each keeps its own properties. Can be separated. |
| solution | Groups of molecules that are mixed in a completely even distribution. A solute dissolved in a solvent. |
| solute | The substance to be dissolved. Example: sugar |
| solvent | The one doing the dissolving. Example: Water is a universal one. |
| colloid | Particles are larger than in a solution but do not settle out. |
| suspension | Can see the particles with the naked eye and they will settle out over time. |
| element | a pure substance - all the atoms have the same atomic number, or number of protons. |
| nucleus | The center of an atom, it contains the protons and neutrons. |
| proton | Particles that have a positive (+) charge |
| neutron | Particles that do not have a charge and are neutral. |
| electron | Particles that have a negative (-) charge. |
| strong force | This holds the nucleus together, keeping the protons and neutrons together. |
| atomic number | The number of protons and electrons found in an element. |
| atomic mass | The mass of an atom. |
| shells | Energy levels where the electrons are found. |
| valence electron | The electrons in the outer most shell, determines bonding. He has 2 valence electrons. |
