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chemistry

TermDefinition
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 number.
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 form 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 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 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 them.
Malleability Metals can be pounded into thin sheets.
Ductility Metals can be stretched and drawn into wires.
Conductivity Metals conduct heat and electricity.
Electron Dot Diagram An easy way to show the valence electrons in an atom or chemical bond
Compound A set of electrons that are chemically bonded and changed into new substance. NaCl = salt.
Chemical Formula A shorthand way to use chemical symbols and numbers to represent a substance, (H2O)
Subscript (H2O) - a 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. 2Cl + 3Na
Chemical Equation Uses symbols to show the relationship between the reactants and products. C + O2 -> CO2
Molecule 2 or more atoms joined in a definite ratio.
Diatomic Molecule A molecule made of 2 atoms of the same element. (ex. 2 oxygen atoms)
Reactant A substance or molecule that starts a chemical reaction.
Product The substance that forms as a result of a chemical reaction.
Law of Conservation of Mass States that matter is neither created or 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 breaks down to form 2 simpler substances
Single - Deplacement 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.
Indicator Will change colors in the presence of an acid or a base.
Created by: villianuevat0718
 

 



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