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Chemistry
| 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. the identity of the element & atomic number |
| Neutron | A neutral subatomic particle in the atom's nucleus....has no charge & 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 & 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 Formula | A shorthand way to use chemical symbols and nummbers to represent a substance |
| Subscript | Small number to the right of the element that shows how many atoms there are of an element |
| Coefficient | the large number that multiplies atoms of the element |
| Chemical Equation | Uses symbols to show the relationship between the reactants & the products |
| Molecule | 2 or more atoms joined in a definite ratio |
| Diatomic Molecule | A molecule made of 2 atoms of the same element |
| law of conservation of mass | States that matter is neither created notr destroyed in a chemical reaction |
| 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 the electrons that swim around in them |
| Malleability | metals can be pounded into thin sheets |
| Ductility | metals can be stretched into wires |
| Conductivity | metal can conduct electricity and heat |
| electron dot diagram | An easy way to show the valence electrons in an atom or chemical bond |
| compound | A set of elements that are chemically bonded and changed into new substances |
| Synthesis reaction | when two or more substances combine to crete one new compound |
| Decomposition reaction | a reaction where a single compound breaks down to form 2 simpler substances |
| single-displacement reaction | one element replaces another element in compound leaving a new compound and one element |
| double-displacement reaction | the two metal ions in two compounds switch places in a chemical reaction |
Created by:
lemedian1
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