| A | B |
|---|
| Exothermic | Reaction where energy is given off |
| Chemical Equation | Abbreviated way to show a chemical reaction |
| Two Parts of a Chemical Reaction | Products, Reactants |
| Endothermic | Reaction where energy is absorbed |
| Conservation of Mass | Matter is not created or destroyed, it changes form |
| Reactants | Starting materials |
| Products | Ending Materials |
| # of total atoms in NaCl | 2 |
| # of Hydrogen atoms in 3H2O | 6 |
| # of Mg atoms in MgO | 1 |
| Mass of Reactants _______ Mass of Products | Equals |
| # of Carbon atoms in 7NaHCO3 | 7 |
| Catalyst | Substance that increases the reaction rate but is not part of the reaction |
| # of molecules in 4NaCl | 4 |
| # of molecules in 5KBr | 5 |
| Subscript | the number written at the lower corner behind the symbol |
| Coefficient | the number written in front of the element symbol(s) |
| Chemical Symbol | letter combination that represents a new element with each capital letter |
| the number of atoms of each element | What a subscript shows |
| the number of molecules | What a coefficient shows |
| Location of Reactants in a Chemical Equation | to the left of the arrow |
| Location of Products in a Chemical Equation | to the right of the arrow |
