Reactivity
something that comes from a competition between temperature and attractive intermolecular forces
Physical Change
this happens when the molecules of the substance don't change
Intermolecular Forces
this exists between tow molecules
Chemical Change
this happens when the molecules of a substance chang
Interatomic Change
this exists between atoms and are much stronger than intermolecular
irreversible
this is a type of change that rearranges atoms to form different substances
Nucleus
this contains 99.8% of its mass
Electron
this has negative charge and is responsible for chemical bonds
Proton
this has a positive charge
Covalent Bond
this happens when a chemical bond between two atoms is formed by sharing a pair of electrons
Electric Charge
this is a fundamental property of matter. It can be positive or negative.
Ionic Bond
This happens when one or more electrons are transferred from atom to another
Molecule
a neutral group of atoms that are covalently bound
Chemical Bond
the connection between two atoms
Enthalpy of Formation
this is the change in energy when one mole of a compound is assembled from pure elements
Chemical Reaction
the process of chemical change is represented
Reactants
this is the initial compound involved in a chemical reaction
Products
these are the compounds that are generated by a chemical reaction
Conservation of Mass
all chemical reactions must satisfy this property
Coefficient
this is the number that tells us how many of each mole participate in a chemical reaction
Exothermic
this is a chemical reaction that releases energy
Endothermic
this is a chemical reaction that absorbs energy
Enthalpy
this is the energy potential of a chemical reaction
Activation Energy
this is energy that is required to start a chain reaction
Balanced Equation
this is a chemical equation that conserves mass
System
this is a group of matter that we choose to investigate
Surroundings
This is everything that is around a system
Precipitate
This is the insoluble compound that takes result from a chemical reaction that takes place in an aqueous solution
Salt
this is an ionic compound that forms ions when dissolved in water
Oxidation
This happens when atoms gain electrons
Acid
this happens when a compound dissolves in water forming an increased amount of Hydrogen ions
Base
this is a compound that dissolves in water to make a solution with a large number of hydroxide ions
Reduction
this happens when an atoms loses electrons
Ph Scale
this is a way to measure the hydrogen ion concentration. It tells us whether a solution is an acid or base
Aqueous Solution
this is a solution whit water as the solvent