MathScience Innovation Center 2010 Misbehaving Molecules— Atoms Alive Mrs. Hobbs MathScience Innovation Center

MathScience Innovation Center 2010 What is going on with those molecules? Are they behaving badly or just doing what molecules do? Let’s investigate.

MathScience Innovation Center 2010 Water--our first molecule We will use two teams to do our water investigation. Each team needs three students.

MathScience Innovation Center 2010 Water Investigation Investigators: find a cup and fill it half full of water then add your materials

MathScience Innovation Center 2010 Add these materials: Cup 1three drops of oil Stir 10 times Cup 2one small scoop of salt Stir 10 times Cup 3one ice cube Stir 10 times

MathScience Innovation Center 2010 What happened? Cup 1 The oil sits on top of the water and will not mix with it. Cup 2 The salt mixes with the water and disappears. Cup 3 The ice cube floats on top of the water.

MathScience Innovation Center 2010 Were those molecules misbehaving? Why won’t the water mix with the oil? Can’t they be friends?

MathScience Innovation Center 2010 What happened? Why does the salt disappear? Is it like a ghost? Can we make come back? How?

MathScience Innovation Center 2010 Are the molecules misbehaving? Why doesn’t the ice sink? Solids are supposed to be denser than liquids.

MathScience Innovation Center 2010 What do the new materials do? Sample #What do you think it will do in water? What happened? Why? You may stir it. 4 5 You may fold it.

MathScience Innovation Center 2010 Sample #What do you think it will do in water? What happened? Why? 1It mixed with water and made it a bit green. It dissolves—it is more like water than oil. 2It settled to the bottom and made a sludge. It dissolves—it is more like water than oil. 3 You may stir it. It settles to the bottom and then dissolves. It disappears like salt but does not look like salt. 4It goes straight to the bottom.It is a solid with high density. 5 You may fold it. It floats until it is folded very small.At first it floats because it is flat but then sinks. What do the new materials do?

MathScience Innovation Center 2010 Molecules come big and small This molecule is monatomic. This molecule is diatomic.

MathScience Innovation Center 2010 Could these be molecules? YES YES

MathScience Innovation Center 2010 What shape are molecules? Some are linear Some are bent Some are planar and trigonal Some are pyramidal Some are tetrahedral

MathScience Innovation Center 2010 Reacting Molecules Element molecule Compound molecules

MathScience Innovation Center 2010 Computer pictures tell a molecule story

MathScience Innovation Center 2010 ChemSketch

MathScience Innovation Center 2010 We can draw molecule images with ChemSketch

MathScience Innovation Center 2010 Choose an element: Carbon is the default choice.

MathScience Innovation Center 2010 Click on the white board to drop a molecule and then drag to add more parts.

MathScience Innovation Center 2010 Now, click on the red and white arrow to “Clean Structure”

MathScience Innovation Center 2010 You may need to erase.

MathScience Innovation Center 2010 Now you try it– make this structure. Every point has a carbon so we have 6 carbon atoms.

MathScience Innovation Center 2010 If you want to name your new structure: Click on this icon at the upper right of the screen.

MathScience Innovation Center 2010 So your new structure is called: hexane

MathScience Innovation Center 2010 What does that name mean? hex means 6 carbons like a hexagon has six sides ane means that it has all single bonds

MathScience Innovation Center 2010 Can you draw this one?

MathScience Innovation Center 2010 Here is its name:

MathScience Innovation Center 2010 Click on the icon at the top right to make 3 dimensional pictures

MathScience Innovation Center 2010 Stick model

MathScience Innovation Center 2010 Now try some of the other versions: This is ball and stick.

MathScience Innovation Center 2010 Add the hydrogen atoms

MathScience Innovation Center 2010 This is the space filling model

MathScience Innovation Center 2010 Click “View”, “Label All”

MathScience Innovation Center 2010 Click “Tools”, “Auto Add Frames” You can make your own molecule movie.

MathScience Innovation Center 2010 Once completed these images can be copied and pasted to documents

MathScience Innovation Center 2010 Draw one water molecule Click on oxygen and drop it on your white board. Now make it 3 dimensional. Draw it on your chart in the place for H_ O_

MathScience Innovation Center 2010 What does water look like? 1. H-O-H 2. O-H-H 3. Or something else?

MathScience Innovation Center 2010 Molecule Formulas Chart Make each molecule on your chart and then draw it. Once you have finished identify the shapes of each one. Then create molecules of your choice and draw them too.

MathScience Innovation Center 2010 Chart 2 Everyday Molecules For those who finish early there are more molecules to draw.

MathScience Innovation Center 2010 Back to water We know its formula. What else do we know from our experiment? What did it do with oil? What did it do with salt? What did it do with ice?

MathScience Innovation Center 2010 Water and Oil Let’s try out some models. What shape is the water?

MathScience Innovation Center 2010 Water and Salt How do the water molecules act towards each other? What does that tell us?

MathScience Innovation Center 2010 Water and Ice Put your six models in the box and shake. What shape do you get? Why does ice float?

MathScience Innovation Center 2010 Do you recognize these ice clusters?

MathScience Innovation Center 2010 What do we know about water Water molecules have a bent shape. Molecule shapes and formulas are found in patterns. The periodic table helps us to predict those shapes and formulas. Ice forms 6 sided clusters.

MathScience Innovation Center 2010 Do you know these molecules ?