Let
’s explore
Let’s
explore what
what you
you know!
know!
•
Analyze the following microscopic representations of different chemical
compounds. Select the image that corresponds to the chemical formulas
listed on the left. The same image may be used to represent different
substances.
NO
CaF2
NaCl
Chemthreads
SO2
•
List the specific features of these drawings that you used to recognize and
match each type of compound:
NO
CaF2
NaCl
Compounds
SO2
•
Analyze the following 3D microscopic representations of two different
chemical compounds (the images are not drawn to the same scale):
KCl
CH3OH
Potassium
Methanol
Chloride
•
Explain what holds the particles present in each of these compounds
together and why their microscopic representations are so different:
CH3OH
KCl
Let
’s learn
Let’s
learn about
about Compounds!
Compounds!
•
Based on what you know about periodic properties, analyze the
following pairs of chemical compounds by comparing their chemical
compositions.
ChemThreads
AgCl
Ionic
HBr
Molecular
Al2O3
Ionic
PbO2
Ionic
CO2
Molecular
•
An ionic compound is composed of:
•
A molecular compound is composed of:
•
Analyze the following microscopic representations of different types of
chemical compounds. Identify the main structural differences between
ionic and molecular compounds.
NaCl
Acetone
FeS2
H2O
Molecular
Ionic
Molecular
Ionic
Molecular Compound
Compounds
N2O5
Molecular
•
•
Ionic Compound
Start the ionic compound simulation and increase the number of
positive and negative ions to 15 each. Analyze the behavior of the
system.
Start the molecular compound simulation and increase the number of
A and B atoms to 10 each. Analyze the behavior of the system.
Let
’s learn
Let’s
learn about
about Compounds
Compounds!
•
Identify the main differences in the formation of the ionic compound versus
the formation of the molecular compound. Discuss the origin of these
differences.
Molecular Compound
ChemThreads
•
NaCl + H2O
Identify the main similarities and differences in the microscopic
representations of these two types of solutions.
Molecular Compound
•
Compounds
Analyze the following microscopic representations of two compounds
dissolved in water (H2O):
Molecular
Ionic
compound
compound
C2H5OH + H2O
•
Ionic Compound
Ionic Compound
Based on the characteristics of the previous microscopic representations of
the chemical compounds dissolved in water (H2O), explain why you think
these different systems conduct electricity or not:
KI + H2O
KI
CH3OH + H2O
Let
’s apply
Let’s
apply what
what we
we learned!
learned!
•
Using the following symbols to represent different atoms and different ions,
draw microscopic representations of these four chemical compounds: H2S,
CuCl2, CO, KCl.
Atoms
Ions
H2S
ChemThreads
•
CuCl2
CO
Classify the following materials as molecular or ionic compound by
checking the appropriate box.
Molecular
Ionic
Neither
•
Decide for each chemical compound whether it will conduct electricity or
not when dissolved in water by checking the appropriate box. In each case,
explain your reasoning.
Explanation
CoF2
KCl
Compounds
KCl
C6H12O6
NF3
SO3
BaO