Unit 6: Ch6.3b – Guided Notes
1. Covalent
a. Electrons are _______________________ between atoms
b. Forms between __________________________
c. Covalent Bonds  _____________________ Compounds
2. What information do the ______________ and ________________ of a molecular
compound provide?
a. _______________ Bonds (Ionic Compounds) i. The ________________ distinguishes the compound from other ionic
compounds containing the same elements.
ii. The ________________ of an ionic compound describes the ratio of the
ions in the compound.
b. ______________________ Bonds (Molecular Compounds)
i. The _______________ and ______________ of a molecular compound
describe the _________________ and __________________ of atoms in a
molecule of the compound.
Naming Order:
3. Step 1: Element that is farthest to the _______________ side of the periodic table is
typically named ________________. (left to right)
a. The most ______________________ element appears ________________ in the
name. These elements are farther to the left in the periodic table.
b. If both elements are in the same _____________________, the more metallic
element is closer to the ____________________ of the group.
c. ______________________ are written same way
d. Example:
i. Sulfur is named ____________________ chlorine  ______________
4. Exception: ___________________ & ___________________
a. Oxygen comes ____________ when combined with lower-electronegativity
_________________________ (Group 17)
b. Example: ClO2 (electronegativity: Cl = _____________; O = _____________)
5. Step 2: Second element name is changed to end in _____________________ (like the
anion in an ionic compound)
a. Examples:
i. Chlorine becomes ____________________
ii. Oxygen becomes _____________________
6. There may be more than one ____________________ compound that can exist with the
_________________________ two elements.
a. Greek ______________________ are used to name molecular compounds.
7. Step 3: Add ______________________ to elements names to specify the
_________________ of atoms of each _______________________ in the compound.
a. mono - ________________
b. di - ________________
c. tri - ________________
d. tetra - ________________
e. penta - ________________
f.
g.
h.
i.
j.
hexa - ________________
hepta - ________________
octa - ________________
nona - ________________
deca – ________________
8. Example:
a. Both Compounds contain __________________ and _______________________
i. N2O  _____________________________________
ii. N4O5  _____________________________________
9. _________________________ to Step 3– ________________ prefix is used if there is
only _______________________ atom of the 1st element in the compound.
a. CO  _____________________________________
b. CO2  _____________________________________
c. SO10  _____________________________________
10. More Examples:
a. N2Cl5  _____________________________________
b. N2O5  _____________________________________
c. P5Cl6  _____________________________________
d. SO10  _____________________________________
Writing Molecular Formulas:
11. Step 1: Write the symbols for the elements in the _____________ the elements appear in
the ________________________.
12. Step 2: Write the _____________________ value of the prefixes as
__________________ for the corresponding element in the ______________________.
a. The prefixes indicate the _________________ of atoms of each ______________
in the molecule.
b. If there is __________ prefix for an element in the name, there is only
______________ atom of that ______________________ in the molecule.
13. Examples:
a. Diphosphorus Pentoxide  ________________________.
b. Silcon Dioxide  ________________________.
c. Carbon Tetrachloride  ________________________.
d. Trineptunium Octoxide  ________________________.
14. Give the formula for:
a. Oxygen Difluoride 
b. Phosphorus Tribromide 
c. Trisilicon Tetranitride 
15. Give the Name for:
a. NO2 
b. N2O3 
c. SO3 