What is an ion?
An electrically charged atom caused by gain or loss of electrons
What are covalent bonds made of
Nonmetals
A + X AX
This is an example of what type of reaction?
Synthesis
What is the name of this model? 
Bohr model
__CO + __O₂ → __CO₂
Balance this equation
2CO + O₂ → 2CO₂
What are ionic bonds made of?
Metals and Nonmetals
A covalent bond in which two atoms share two pairs of electrons.
double bond
A + BX AX + B
This is an example of what type of reaction?
Single Replacement
What model is the name of this model? 
Lewis dot
__Mg + __O₂ __MgO
Balance this equation
2Mg + O₂ → 2MgO
What is the name of a positive ion?
Cation
Si₃N₄
Name this covalent compound
trisilicon tetranitrogen
What kind of reaction occurs when a substance combines with oxygen releasing a large amount of energy in the form of light and heat?
Combustion
How many valence electrons is allowed in the first energy level of a Lewis Dot?
2
What are the Laws of Conservation of Mass?
Mass of reactants=Mass of products
What does the roman numeral mean for a transition metal?
The charge
What is a prefix representing 4 atoms?
Tetra
AX A + X
This is an example of what type of reaction?
Decomposition
How many valence electrons does it take to complete the second energy level?
8
What is a catalyst?
A substance that speeds up a chemical reaction
What is the rule where atoms loose, gain, or share electrons to become stable?
Octet Rule
P₂O₅
Name this covalent compound
diphosphorus pentoxide
AX + BY AY + BX
This is an example of what type of reaction?
Double Replacement
How many energy levels does Calcium (Ca) have?
4
__CaO + __H₂O --> __Ca(OH)₂
Balance this equation
Already Balanced