You've learned that atoms are
the building blocks of molecules and molecules are the building
blocks of matter. The Phantom needs your help to construct a
few molecules and, like a true scientist, he wants to make a
few models of the molecules first.
4 miniature marshmallows(oxygen)
7 red gum drops (hydrogen)
7 green gum drops (chlorine)
2 yellow gum drops (sulfur)
25 toothpicks (covalent bonds)
1. Construct models of the following molecules:
H2, HCl, H2O (Hint: attach the hydrogen at
right angles to the oxygen)
2. Now construct models of these molecules:
Cl2, H2S, Cl2 O and Cl2S
3. Classify the molecules as a gas, liquid
or solid at room temperature.
4. Draw diagrams of each of the model molecules
you have constructed. Check your diagram with the diagrams in
the Handbook of Chemistry or other reference.
When the chemical formula for a
molecule or compound is written, it shows the number of each
type of atom or element in the molecule. These numbers, called
subscripts, are determined by the bonding between the atoms.
In the models you constructed, the toothpicks represented the
bonds between the atoms. In reality, some atoms give up electrons
when compounds are formed and some gain electrons when they form
compounds.
Life is a chemical process! Indeed,
chemicals are all around us and inside us. Create a table showing
the chemical formula for each of the molecules you constructed,
and identify a common use for that chemical. Don't be afraid
to surf the web looking for answers. You might even find the
Phantom out there looking for new molecules.
You can buy this resource on CD-ROM for
use on computers without internet access.
Visit our online
store for more information!
4 miniature marshmallows (oxygen)
1. Construct models of the following molecules:
When the chemical formula for a
molecule or compound is written, it shows the number of each
type of atom or element in the molecule. These numbers, called
subscripts, are determined by the bonding between the atoms.
In the models you constructed, the toothpicks represented the
bonds between the atoms. In reality, some atoms give up electrons
when compounds are formed and some gain electrons when they form
compounds.
