CW#____ CHEMICAL BONDING
BEFORE VIEWING THE MOVIE:
Answer the following questions:
1) How do Hydrogen and Oxygen “stick” together?
2) When is an atom “stable”?
3) When is an atom “unstable”?
WHILE VIEWING THE MOVIE:
4) Define “IONIC BOND”
5) Define “COVALENT BOND”
AFTER VIEWING THE MOVIE:
6)
Explain, IN YOUR OWN WORDS, how atoms “stick” together.
WHAT IS AN OXIDATION NUMBER?
It's important to know if an atom loses or gains electrons when
combining with other atoms to form compounds.
How do we keep track of the electrons lost or gained by an
atom? We do this by looking at an atom's oxidation number.
An oxidation number is a number that is assigned to an atom in
a substance. The oxidation number could be positive, negative,
or zero, and it indicates if electrons are lost or gained.
 If the oxidation number is positive, then this means that the
atom loses electrons.
 If the oxidation number is negative, it means the atom gains
electrons.
 If the oxidation number is zero, then the atom neither gains
nor loses electrons.
CHARTING OXIDATION #’s
Complete the following chart using your Periodic Table.
ELEMENT
ATOMIC
NUMBER
HYDROGEN
1
HELIUM
LITHIUM
BERYLLIUM
BORON
CARBON
NITROGEN
OXYGEN
FLUORINE
NEON
SODIUM
MAGNESIUM
ALUMINUM
SILICON
PHOSPHORUS
SULFUR
CHLORINE
ARGON
POTASSIUM
CALCIUM
NUMBER
OF
PROTONS
(+)
1
NUMBER
OF
ELECTRONS
(-)
1
NUMBER
OF
VALENCE
ELECTRONS
1
OXIDATION
NUMBER
1+
LET’S IONIC BOND
Use the cards to determine which elements (1 CATION and 1
ANION) are bonding. Then, balance the reaction and write the
BALANCED CHEMICAL FORMULA
**COMPLETE SECTION 1, THEN PROCEED TO SECTION 2**
CATION
ANION
BALANCED
FORMULA
 SECTION 1 
CATION
ANION
BALANCED
FORMULA
 SECTION 2 