Balancing Equations Chemical Reactions Structure of an Atom Scientific Method Lab Equipment
What is Hydrogen
The letter H represents which element/atom in a chemical equation?
What are the reactants
The molecules on the left side of an equation are these.
What is 2 hydrogens and 2 oxygens
How many hydrogens and oxygens are present in a single hydrogen peroxide molecule?
What are the products
The molecules on the right side of an equation are these.
What is a subscript
This number tells you how many of an atom is present in any given formula. It is written to the right and slightly below the atom.
What are signs of a chemical reaction.
Bubbling, color change, formation of gas, formation of precipitate, odor change, endothermic or exothermic reaction.
What is a coefficient
This number tells you how many molecules are present in total. It is written to the left of the molecule.
What are the three states of matter?
What is

N2 + 3H2 ---> 2NH3
Balance this equation:

____N2 +____H2---> ____ NH3

Understanding Chemical Reactions

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