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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
atoms
the tiny pieces that all matter—all the stuff in the world—is made of
chemical reaction
a process in which atoms rearrange to form new substances
corrosive
able to cause damage
fertilizer
a substance that is added to soil to help plants grow
model
an object, diagram, or computer program that helps us understand something by making it simpler or easier to see
molecule
a group of atoms joined together in a particular way
product
an ending substance that is made during a chemical reaction
property
something that can be observed about a substance, such as color, smell, or boiling point
reactant
a starting substance that is part of a chemical reaction
rearrange
to change the order or position of something
scale
the relative size of things
substance
something that is made of all the same atoms or groups of atoms
electron
a negatively charged subatomic particle
combustion reaction
a chemical reaction that occurs when a substance reacts with oxygen, releasing energy in the form of heat and light
Law of Conservation of Mass
Matter is not created nor destroyed in any chemical or physical change
boiling point
the temperature at which a substance changes from the liquid phase to the gas phase
chemical formula
letters and numbers showing the types and number of atoms that repeat to make up a substance
extended structure
a structure formed by repeating groups of atoms that link together in a large network
melting point
the temperature at which a substance changes from the solid phase to the liquid phase
valence electrons
the electrons in the outermost orbital or shell of an atom
atomic mass
the number of neutrons and protons in an atom
atomic number
the number of protons in an atom
precipitate
A solid that forms from a solution during a chemical reaction.
Note 
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