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Atom Smallest piece of matter 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
Neutron A neutral subatomic particle in the atom's nucleus has no charge 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 on the outer level of an atom that causes atoms to bond together
Chemical Bond An interaction that hold two atoms together
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 & changed into new substances
Chemical Formula A short hand way to use chemical symbols and numbers to represent a substance.(H2O)
Subscript (H2O)- small number to the right of the element that shows how many atoms are in the element.
Coefficient The large number that multiplies atoms of the element 2Cl + 3Na
Chemical Equation Uses symbols to show the relationship between the reactants and the products.C + O2=CO2
Reactant A substance or molecule that starts a chemical reaction.
Product The substance that forms as a result of a chemical reaction.La
Law of Conservation of Mass States that matter is neither created nor destroyed in a chemical reaction.
Synthesis Reaction When 2 or more substance combine to create one new compound
Decomposition Reaction A reaction where a single compound braks down to form 2 simple substances
Single-Displacement Reaction One element replaces another element in a compound leaving a new compound and 1 element
Double Displacement Reaction The 2 metal ions in 2 compounds switch places in a chemical reaction
Indicator Will changes in colorsin the presence of an acid or a base
Created by: _natalie5_



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