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Atom Smallest piece of matter that has the same properties of the elemet it is in.
Proton A positive subatomic particle in the atom's nucleus. Is the identity of the element and atomic number.
Neutron A neutral 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.
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 joning of atoms to form new substances.
Ionic Bonding Is formed when electrons are transferred from one atom to .another atom.
Ion Charged particle or atom that gained or lost electrons.
Crystal Lattice Repeating, 3 dismesional pattern that forms when ions bond.
Covalent Bond The type of bond that forms when atoms share electrons instead of transfering tem.
Metallic Bond A special bond between metal ions and the electrons that swim around them.
Malleability Metals can be pounded into thin sheets.
Ductility Metals can be streched and drawn into wires.
Conductivity Metal can conduct or carry electricity through wirres. Metals that can conduct or carry heat in order to cook food.
Chemical Formula A shortand way to ise chemical sybols and numbers to represent a substance.
Chemical Equation Uses symbols to show the relationship between the reactants and the products.
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 element.
Molecule Two or more atoms joined in a definite ratio
Diatomic Molecule A molecule made of two atoms of the same element
Reactant A substance or molecule that starts a chemical reaction
Product The substance that matter is neither created nor destroyed in a chemical reaction.
Law of Conservation of Mass States that matter is neither created nor destroyed in a chemical reaction
Synthesis Reaction When two or more substances combine to create one new compound
Decomposition Reaction A reaction where a single compound to form 2 simpler substances
Single-Displacement Reaction One element replaces another 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.



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