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Chemistry Vocabulary
| Term | Definition |
|---|---|
| Atom | Smallest piece of matter that has the same properties of the element it is in. |
| Proton | A positive subatomic particle in the atoms nucleus is the identity of the element and atomic number. |
| Neutron | A negative subatomic particle 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! |
| Periodic Table Of Elements | A chart that organizes all the elements by the atomic numbers 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. |
| 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 | a special bond between metal ions and electrons that swim around them. |
| chemical formula | a shorthand way to use chemical symbols and numbers to represent a substance. |
| subscript | small number to the right of the element that shows how many atoms there are of the element. |
| coefficient | the large number that multiplies atoms of the elements. |
| chemical equation | uses symbols to show the relationship between the reactants and the products. |
| synthesis reaction | when two or more substances combine to create one new compound |
| decomposition | a reaction where a single compound breaks down to form 2 simpler substances |
| single displacement reaction | one element replaces the other element in compound leaving a new compound and 1 element. |
| double displacement reaction | the 2 metal ions in 2 compounds switch places in a chemical reactions |
| indicator | will change colors in the presence of an acid or a base. |