| Term | Definition |
|---|---|
| Matter | anything that has mass and takes up space |
| Mass | the material that matter is made up of |
| Volume | how much volume or room something takes up |
| Density | D=m/v the amount of material/stuff matter takes up within a specific space |
| Atom | what everything is made up of, smallest part of an element |
| Electron | negative charged atom, has an attractive force |
| Proton | positive charged atom in nucleus |
| Neutron | neutral charged atom |
| Periodic Table | all of the elements and their atomic number organized |
| Element | can't be broken down, makes up all matter |
| Periods/Rows | energy levels of elements electrons |
| Groups/Family/Columns | energy level, electrons moving on outer shell |
| Valence Electrons | electrons moving on outer shell |
| Atomic Number | how many protons and electrons in nucleus |
| Atomic Mass | measurement of mass for an elements atom |
| Chemical Property | combining substances and forming new substances and compounds |
| Physical Property | change in state of matter and appearance |
| Iconic Bond | elements losing or gaining electrons during bonding |
| Covalent Bond | elements share electrons when bonding |
| Chemical Change/Reaction | elements bond together through the attractive force of electrons |
| Compound/Molecule | two or more elements combine in a specific ratio |
| Mixture | two or more substances combined keeping same properties |
| Nobel Gases | all elements in group 18, 8 electrons on outer shell |
| Halogens | all elements in group 17, very reactive |
| Alkali Metals | all elements in group 1, very reactive because of only one valence electron |
| Metalloids | elements between metals and non-metals have 3 – 7 valence electrons |
| Endothermic | taking in |
