Before you get started, you should know the difference between an element and a compound and how to draw
particle diagrams of elements and compounds. If you don't know these things, stop, take a break and find out. Then
come back when you are ready.
1.
2. Open the website and click to get started. On the screen at the bottom, you'll see some bowls of atoms. On
the right, you'll see a list of molecules you must make. To get to other bowls of atoms, click the arrows on either side
of the white box holding the bowls. Use the atoms to make the molecules and fill out the chart below.
Chemical
Formula
Number and kind
of elements
Draw it!
Element or
Compound?
Number and kind
of elements in
ONE molecule
Number of
molecules
TOTAL number
and kind of
elements needed
H₂O
Draw it!
2 H+10
Element or
Compound?
E C
4. Just like we did previously, lets fill out this chart. But there are some extra rows this time!
Chemical
Formula
2CO₂
88
3. Excellent! Now click pe for this next part. It looks pretty much the same but there is something different about
the chemical formulas. What is different about the chemical formulas you see on this page?
1C+20
2
0₂
2 C and 40
E C
E C
H₂
20₂
E C
E C
CO₂
E C
4H₂
N₂
E C
E C
2NH3
E
C
