Test Review Chapter 12 chemical bonds
June 3
What is a chemical bond?
What does the bond energy of a chemical bond represent?
What is electronegativity?
What are the three types of bonds we studied? Describe each type of bond.
Which element is most electronegative?
K, Na, H
F, Br, Na
B, N, F
Rb, Sr, I
Indicate what type of bond forms in each of the following – use electronegativity difference.
O-O
Al – O B- O
K – Cl
Br – Cl
Cl – Cl
Which of the following molecules contain a polar covalent bond?
H2O
CO F2
N2
C2H6
Which pair has the more polar bond?
H-F or H-Cl
H-Cl or H-I
H-Br or H-Cl H-I or H-Br
O-Cl or O-Br
P-S or P-O
What types of elements react to form an ionic compound?
What are some characteristics of ionic bonds?
Which bond in each of these pairs has the greater ionic character?
Na-F or Na-I
Ca-S or Ca-O
Li-Cl or Cs-Cl
Mg-N or Mg-P
For each of these molecules – which end is negative relative to the other end?
HCl CO
BrF ClF ICl B-C
Si-C
What is the dipole moment? How is it drawn? Show it for S-Cl
What does it mean to say that in forming bonds and stable compounds, atoms try to achieve an electron
configuration like a noble gas?
What do metals do to form ions? Non-metals?
Which simple ion would each of the following form? What noble gas has an electron configuration like
it?
Cl z=17
Sr z=38 O z=8 rubidium z=37
For each of the following give a positive ion that would have that many electrons and write the
complete electron configuration for the ion. 1s 2s 2p 3s 3p 4s 3d
10 electrons
18 electrons
For each of the following give a negative ion that would have that many electrons and write the
complete electron configuration for the ion. 1s 2s 2p 3s 3p 4s 3d
10 electrons
18 electrons
Which of the following has an ionic bond?
CO2
CaBr2
HBr
Cl2
NaCl
Why are valence electrons of an atom the ones likely involved in bonding to other atoms?
What does octet mean and why is there an octet rule in writing Lewis structures?
How many electrons are involved when two atoms in a molecule are connected by a double bond?
Write the simple Lewis structure for each of the following atoms
Xe
Br
O
Na
Mg
Al
Give the total number of valence electrons in each of the following molecules:
H2O
CO
F2
N2
C2H6 C4H10
Write a Lewis structure for each of the following compounds
HI
PCl3
SiH4
CCl4
H2O