1. Two or more atoms may combine to form molecule 
    • Short hand used to depict the numbers and types of atoms in a molecule  Molecular Formula
    • Representation of the way atoms bond in a molecule  Structural formula
    • the space occupied by an electron circling the nucleus at a particular energy level Electron Shell
    • except the first shell, it takes 8 electrons to fill the outer shell octet rule
    • connection between atoms in a compound bond
    • nonreactive with other elements inert
    • an electron  located in the outer shell of the atom, that can be transferred to or shared with another atom valance electron
    • outer most shell is completely filled with electron and is inactive is what type of atom inert atom
    • atoms that gain or lose electrons become electrically charged and are called ions
    • positively charged ions are called cations
    • negatively charged ions are called anions
  2. ions with opposite charges attract forming ionic bonds
    • a chemical bond between atoms that share electrons  is a covalent bond
    • electrons and protons are not distributed symmetrically polar
    • three types of chemical bonds: hydrogen bond, covalent bond, ionic bond
  3. the STARTING materials changed by the chemical reaction reactants
    • the atoms, ions, or molecules formed AFTER the reaction products
    • Building large molecules by bonding smaller ones synthesis Rx
    • if the bonds of a reactant molecule break apart to form simpler forms its called decomposition Rx
    • parts of two different types of molecules trade positions as bonds are broken exchange Rx
    • the product or products can change back to the reactant or reactants reversible Rx
    • molecules that influence the rates of chemical reactions but are not consumed catalyst
Card Set