The Atom
The smallest particle that can be divided and be the same element
Atom
A chart of the elements
The Periodic table
The process by which one or more substances change to produce one or more different substances
Chemical Reaction
A reaction in which energy is absorbed
Endothermic Reaction
Higher _______= faster rate of reaction
Temperature
The positively charged particles of the atom
Protons
A one or two letter representation of an element
Chemical Symbol
A combination of chemical symbols and numbers to represent a substance
Chemical Formula
A reaction that releases energy in the form of heat
Exothermic Reaction
Increase reaction rate by bringing together reactants
Catalyst
Particles that have no charge
Neutrons
Vertical column in the periodic table
Group
A substance that takes part in and undergoes change during a reaction.
Reactant
Atomic mass unit
Type of Catalyst found in living things
Enzymes
Negatively charges particles
Electrons
Horizontal row in the periodic table
Period
A substance produced in a chemical reaction
Product
Higher ________=more reactants
Concentration
The law that states that mass cannot be created or destroyed in ordinary chemical and physical changes
Law conservation of mass
A small, dense, center that has a positive charge
Nucleus
The number of protons in the nucleus of an atom
Atomic number
Energy cannot be created or destroyed
Law conservation of energy
Greater ______________= reaction rate decreaces
Surface Area
A representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products
Chemical Equation