When two or more atoms chemically
combine.
Bond that occurs between a metal
and non-metal by transferring
electrons.
When atoms share electrons
unequally
Compounds that are formed by covalent
bonds are called
Chemical Bond
Ionic Bond
polar bond
molecules
Chemical Bond
Binary Compound
the force that holds atoms together
in a compound.
A compound made from only two
elements
Non-polar bond
When atoms share electrons equally
Covalent Bond
A bond that forms by sharing electrons
between two non-metals
Oxidation number
the charge of an ion is called
Anion
a negatively charged ion.
Polyatomic Ion
is a compound that has a
charge
Electron Configurations
(like the noble gasses)
Typically, atoms gain or lose
electrons to achieve stable___
An atom with a charge
a positively charged ion.
Ion
Cation
Compounds that are formed by
ionic bonds are called
Formula Units
Which groups contain elements
with stable electron
configurations
Group 18
BeCl2
2 oxygen atoms
A
Metallic
Beryllium, Be, and chlorine, Cl, form a
binary ionic compound with a one-totwo ratio of beryllium ions to chloride
ions. The formula for the compound
is_______________
In the compound CO2 the subscript 2
indicates that________
Which of the following formulas
represents a compound whose
molecules contain a triple bond?
A. N N B. O3 C. O O
D. SO3
positively charged metal ions are
surrounded by a cloud of electrons, the
outer energy level held loosely so the
electrons can flow easily between the
ions
The elements most likely to form more
than one type of ion are the_____
Alkali metals, alkaline earth metals, and
aluminum all form ions with positive
charges equal to the _______ _______
Which of the following are molecules?
Formula Units?
H2 CO2
NaCl
H2 O
How do you Know?
In the name carbon dioxide, the prefix
of the second word indicates that a
molecule of carbon dioxide
contains_____
Transition Metals
Valence electron number
Molecule= H2, CO2, H2O
Formula unit=NaCl
Because:
ionic bonds=formula units covalent
bonds=molecules
1 carbon atom and 2 oxygen atoms
1. Potassium oxide
2. Sodium Fluoride
3. Carbon tetrahydride
4. Lithium Bromide
a. ionic
b. ionic
c. covalent
d. ionic
e. covalent
f. covalent
F
O
2-
Name these compounds
1. K2O
2. NaF
3. CH4
4. LiBr
Identify as ionic or covalent:
a. MgO
b. KI
c. NO2
d. FeCl3
e. P2O5
f. N2O3
Draw the electron dot diagram for
Fluorine
What is the ion notation for Oxygen?
Name these compounds
5. CaCl2
6. CO2
7. H2O
8. BaSO4
1. Calcium chloride
2. Carbon Dioxide
3. Di-hydrogen monoxide
4. Barium Sulfate
Write the chemical formula for the
following using crisscross method.
1. Al +F
2. B + C
3. Mg +N
4. Mg + C
1. AlF3
2. B4C3
3. Mg3N2
4. Mg2C
5.
Figure up the charges of each symbol and
criss-cross, then reduce
5. How do you figure out these problems?
What is the oxidation number for:
1. Ca
2. Al
3. O
4. N
What is the valence number for Sulfur?
How do you find its oxidation number?
1.
2.
3.
4.
+2
+3
-2
-1
6
Look at the valence number and figure up
how many electrons it needs to gain to get 8
in its outer shell