Proton
a subatomic particle that has a positive charge and that is found in the nucleus of an atom
Neutron
a subatomic particle that has no charge and that is found in the nucleus of an atom
Electron
negatively charged particle; located outside the atomic nucleus
Nucleus
the central core of an atom that contains protons and neutrons
Electron cloud
the system of electrons surrounding the nucleus of an atom
Matter
The substance that all physical properties are composed of
Valence Electron
the electrons that are the farthest away from the nucleus of an atom and involved in chemical reactions
Subatomic Particles
particles inside an atom (protons, neutrons, electrons)
Chemical Equation
a shorthand way to use chemical symbols and numbers to describe a chemical reaction
Law of Conservation of Mass
the law that states that mass cannot be created or destroyed in ordinary chemical and physical changes
Mass
Amount of matter in an object
Coefficient
the "big" number in front of a chemical formula that shows the number of molecules of a compound
Chemical Formula
way of writing the name of a compound using chemical symbols
Yield
The arrow in a chemical equation that points to the product
Reactant
a chemical substance that is present at the start of a chemical reaction
Product
a chemical substance formed as a result of a chemical reaction
Subscript
a "small" number written to the right of a chemical symbol in a formula
Compound
a substance made up of two or more elements joined by chemical bonds