Unit 6 Studyguide/Review Packet:
Test: B: Thursday 17 December 2015
A: Friday 18 December 2015
Ionic/Metallic Bonds:

types of particles bonding

force holding atoms together

difference in electronegativity (only ionic)

properties

how delocalized electrons explain properties of metals
Covalent Bonds:

Classify bond types based on EN differences
NPC:
PC:
I:

What is a molecule?

Determine valence electrons of atoms and molecules

name/write formulas for molecules using prefixes

State and Apply the octet rule

Write Lewis Dot Structures

Fill in the chart: see example on next page

Describe the three main intermolecular forces in terms of strength and
“Weird” Atoms that do not follow the octet rule:
Element
Symbol
Number of electrons in
valence:
2
hydrogen
H
4
beryllium
Be
6
boron
B
If a central atom has 5 bonded atoms it may have 10 valence eIf a central atom has 6 bonded atoms it may have 12 valence e-
Write T for true and F for false. If a statement is false, replace the underlined word or
phrase with one that will make the statement true, and write your correction in.
___a. Dispersion forces are the only attractive forces that attract between non-polar
molecules.
___b. Molecules cannot exhibit both dipole-dipole forces and hydrogen bonding.
___c. A non-polar molecule can have polar bonds. If true, then when?
___d. Water is a non-polar molecule that has polar bonds.
Fill in the chart:
molecular
formula
number
of
(total)
valence
e-
lewis dot
structure
number
of
bonded
atoms
(B)
number
of lone
pair (E)
type of
molecule
(A B E)
molecular
shape
polarity
of
molecule
(P or
NP)
carbon
tetrachloride
_____
water
_____
CHCl3
nitrogen
tribromide
_____
Practice:
1.
Pairs of electrons that bond two atoms in a molecule are called ___shared pairs_____.
2. Pair of electrons that are unshared are called __________________________.
3. Because each of the bond angles of methane equals 109.5⁰, its molecular shape is a perfect
______________________.
4. Define “dipole” in your own words! DO NOT use the same definition from your notes,
paraphrase and simplify!
5. Are the bonds in a polar molecule arranged symmetrically or asymmetrically?
6. Matching (write the roman numeral beside the letter it matches)
___a.
a non-polar molecule in which
i. dispersion forces
the charge distribution is very briefly
asymmetrical
___b.
forces generated by instantaneous dipoles
ii. dipole-dipole forces
___c.
forces between molecules
iii. instantaneous dipole
___d.
forces within a molecule
iv. intramolecular forces
___e.
attractive forces between two molecules
v. intermolecular forces
of the same or different substance that
are both “permanent” dipoles