Naming Compounds
P2O5
Diphosphorus pentaoxide
According to the law of conservation of mass, if two atoms of hydrogen are used as a reactant, how many atoms of hydrogen must be part of the product?
2
Draw a Lewis Dot Structure of Carbon (C)
4 valence electrons
Sodium Chloride
NaCl
Photosynthesis happening in a leaf.
Chemical --> New things are being made!
PCl5
Phosphorus pentachloride
___ C6H6 + ___ O2 --> ___ CO2 + ___ H2
C6H6 + 6 O2 --> 6 CO2 + 3 H2
Draw a Lewis Dot Structure of Phosphorus
5 valence electrons
Potassium Nitrate
K3N
K = +1
N = -3
The components of a chemical reaction look like which of the following?
a. products --> reactants
b. coefficients + ions --> ions + coefficients
c. reactants --> products
c. Reactants --> Products
NO2
Nitrogen dioxide
___ Na + __ Fe3(SO3)2 --> __ Fe + ___ Na2(SO3)
4 Na + Fe3(SO3)2 --> 3 Fe + 2 Na2(SO3)
Draw a Bohr Diagram of Nitrogen
7 total electrons -- 2 in the first ring and the remaining 5 in the second ring.
Barium Chloride
BaCl2
Ba = 2+
Cl = 1-
What's the difference between an elemental atom and an ion?
An ion has gained or lost electrons -- meaning it has a charge.
Elemental atoms are neutral -- no charge.
As2O3
DiArsenic TriOxide
When is a chemical equation balanced? What has to happen?
The equation shows an equal number of atoms for each element on both sides.
If the formula for a compound is represented by X2Y3 and the oxidation number of Y is 2-, what is the oxidation number of X?
+3
Magnesium Sulfite (SO3)4-
Mg2(SO3)
Mg = 2+
(SO3) = 4-
For all atoms other than hydrogen and Helium, a full outer level consists of ____ electrons.
8
Cu3(PO4)2
Note: (PO4) = Phosphate (3- charge)
Copper (II) Phosphate
__ Ag(NO3) + __ Na2S ---> __ Ag2S + ___ Na(NO3)
2 Ag(NO3) + Na2S ---> Ag2S + 2 Na(NO3)
Heterogeneous -- more than just salt and water in an ocean. Fish, rocks, plants, etc. Not evenly distributed.
Iron (II) Borate (BO3)3-
Fe3(BO3)2
Fe = 2+
(BO3) = 3-
Why do the noble gases not form compounds readily?
They have a full octet, aka a full outer shell of electrons.