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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. |