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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
Created by: csquad4life



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