Unit 6: Periodic Table and Bonding - Mark Rosengarten

7) Complete the following chart, drawing the dot diagram of each element in the molecule and then the dot
diagram of the molecule. If the formula is H 2 O, make sure you have two atoms of H and one of O in your dot
diagram of the molecule.
Formula Dot diagram for: Dot diagram for: Dot Diagram of Molecule
F
F
F 2
N 2
N N
HBr
H
Br
H 2 O
H
O
N
H
NH 3
8) Identify the following bonds as being polar covalent or nonpolar covalent. For the polar covalent bonds,
label the δ + and δ - ends.
Bond END Polar or Nonpolar? If polar, label the δ + and δ - ends
H – H
H – C
H – Cl
9) Regarding the nonmetallic element, oxygen:
H – H
H – C
H – Cl
a) Oxygen atoms have ____ unpaired valence electrons. This means that they can form ____ covalent bonds.
# #
b) Two O atoms have ____ unpaired electrons between them. When they form O 2 , they share ____ electrons.
# #
c) Two O atoms form ____ bonds between them, also known as a ___________________ bond.
# type
d) Each covalent bond is a __________ of shared unpaired valence electrons that form ____________ orbitals.
© 2011, Mark Rosengarten AE 24