| A | B |
|---|
| Au | Gold |
| Si | Silicon |
| Pb | Lead |
| H | Hydrogen |
| Zn | Zinc |
| He | Helium |
| Hg | Mercury |
| C | Carbon |
| I | Iodine |
| N | Nitrogen |
| Ca | Calcium |
| O | Oxygen |
| S | Sulfur |
| Na | Sodium |
| Ni | Nickel |
| Al | Aluminum |
| Mg | Magnesium |
| F | Fluorine |
| Cl | Chlorine |
| Ne | Neon |
| Fe | Iron |
| K | Potassium |
| Cu | Copper |
| Ag | Silver |
| matter | anything that has mass and takes up space |
| volume | the amount of space an object takes up |
| atom | the smallest particle that still behaves like the original matter it came from |
| nucleus | the center of an atom made up of protons and neuetrons |
| electron shell/cloud | area in which electrons go around the nucleus of an atom |
| element | matter that is made up of only one kind of atom |
| proton | a particle with a positive electrical charge found in the nucleus of an atom |
| electron | a particle with a negative electrical charge moving around the nucleus of an atom |
| neutron | a particle with no electrcial found in the nucleus of an atom |
| periodic table | a chart scientists use to organize the elements |
| atomic number | the number that tells how many protons are in the nucleus of an atom |
| atomic mass | equals the number of protons and neutrons in the nucleus of an atom |
| compound | two or more elements combine to form a new substance |
| formula | a group of symbols that shows how many atoms of each element are in a molecule of a compound |
| molecule | two or more atoms held together by a bond |
