Chemical Equations/Models

Measure of the amount of matter 

• mass
• volume
• weight
• density

Anything that has mass & takes up space

• gravity
• force
• matter
• volume

Smallest unit of an element

• compound
• atom
• molecule
• product

Number placed in front of a chemical formula

• product
• coefficient
• reactant
• subscript

Number written below & to the right of a chemical symbol

• subscript
• reactant
• product
• coefficient

Substances that form as the result of a chemical reaction

• products
• reactants
• coefficients
• subscripts

Substances present at the start of a chemical reaction

• subscripts
• coefficients
• reactants
• products

How many iron atoms are in 
Fe(NO₃)₂

• 1
• 2
• 3
• 6

How many nitrogen atoms are in 
Fe(NO₃)₂

• 1
• 2
• 3
• 6

How many oxygen atoms are in 
Fe(NO₃)₂

• 1
• 2
• 3
• 6