Reactants
The substances we start with. They are written on the left side of the arrow.
Products
The substances that are created. They are written on the right side of the arrow.
Arrow
The arrow indicates that a chemical change has occurred.
Coefficients
The larger-sized numbers that come before a chemical formula. They indicate how many separate instances of substance are present in the reaction.
Example.) 3H (the three)
2
Subscripts
The smaller numbers that come after an element symbol. These indicate there are multiple instances of the same element within a substance.
Example.) 2NH (the three)
3
States of matter
The abbreviations that come after each substance in a chemical equation