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Chemistry
Vocabulary
| Term | Definition |
|---|---|
| Atom | Smallest piece of material that has the same properties of the element it is in. |
| Proton | A positive + subatomic particle in the atom's nucleus. Is the identity of the element and atomic number. |
| Nuetron | A negative subatomic in the atoms nucleus...has no change and most of the mass. |
| Electron | A negative subatomic particle spinning outside the nucleus of an atom. Tiny! |
| Element | The simplest forms of matter that contain only one type of atom. |
| Periodic Table of Elements | A chart that organizes all the elements by atomic number and properties. |
| Valence Electron | The electron in the outer level of an atom that causes atoms to bond together |
| Chemical Bond | An interaction that holds 2 atoms together |
| Chemical Bonding | The joining of atoms to form new substances |
| Ionic Bond | Is formal when electrons are transferred from one atom to another atom |
| Ion | Charged particle or atom that gained or lost electrons |
| Crystal Lattice | Repeating, 3 dimensional pattern that forms when ions bond |
| Covalent bond | The type of bond that forms when atoms share electrons instead of transferring them |
| Metallic Bond | Metals can be pounded in a thin sheets |
| Ductivity | Metals can be stretched and drawn into wires |
| Electrical Conductivity | Metal can conduct on carry electricity through wires |
| Thermal Conductivity | Metal can conduct or carry heat in order to cook food |
| Electron Dot Diagram | An easy way to show the valence electrons in an atom or chemical bond |
| Compund | A set of elements that are chemically bonded & changed into new sunbstances... EX: NaCl= salt |
| Chemical Formula | A shorthand way to use chemical symbols and numbers to represent a substance. (H2O) |
| Chemical Equation | Uses symbols to show the relationship between the reactant and the products. C+O2= CO2 |
| Subscript | (H2O)- small number to the right of the element that shows how any atoms there are of the element |
| Coefficient | The large number that multiplies atoms of the element. 2Cl + 3Na |
| Molecule | 2 or more atoms joined in a definite ratio keeps phys. and chem. properties |
| Diatomic Molecule | A molecule made of`2 atoms of the same element (ex. oxygen atoms.) |
| Reactant | A substance or molecule that starts a chemical reation |
| Product | The substance that form as a result of chemical reaction |
| Law of Conservation of Mass | States that matter is neither created nor destroyed in chemical reaction |
| Synthesis Reaction | When two or more substances combine to create one new compound. |
| Decomposition Reaction | A reaction where a single compound breaks down to form 2 simpler sunstances |
| Single Displacement Reaction | One element replaces another element in compound leaving a new compounds switch places in a chemical reaction |
| Double Displacement Reaction | The 2 metal ions in 2 compounds switch places in a chemical reaction |
| Indicator | Will change colors in the presence of an acid or a base |
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csquad4life