Chemistry Test

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