Explain it with Molecules

WATER MOLECULE

Why is water such a good solvent?

MOLECULAR STRUCTURE OF ICE

Why does ice float?

Measure length of hydrogen bonds in ice using Jsmol. Measure O-O distances in water and ice.

MOLECULAR STRUCTURE OF ICE

Hydrogen Bonds in Water and Ice

View using Jsmol the hydrogen bonds in water and ice

METHANE
What is the geometry of methane?

Measure angles in methane molecule. Contains assessment questions

SOLIDS - LIQUIDS - GASES
Why do solids, liquids and gases behave differently?

Using the case of H₂O, it is shown using Jsmol why ice, water, and water vapor behave differently.

ALPHA AND BETA GLUCOSE
What's the difference between alpha and beta glucose?

Jsmol for alpha and beta-glucose... What is the difference between starch and cellulose?

CAFFEINE
How does Caffeine work in the Brain?

Comparison of caffeine to adenosine. Visualize caffeine bound to A2 adenosine receptor molecule

SUCROSE AND FRUCTOSE
What's the difference between surcrose and fructose?

Molecular structure comparisons of different fructose molecules and sucrose... relative sweetness graph of various sugars.

CARBON MONOXIDE
Why is carbon monoxide so dangerous?

Comparison of Oxygen and Carbon Monoxide bound to heme.

PSEUDOEPHEDRINE, EPHEDRINE AND METHAMPHETAMINE
What is the difference between pseudoephedrine, ephedrine and methamphetamine?

How can small changes in a molecule result in major physiological and psychological changes?

SOAP
How does soap work?

What is soap? How does soap work? Contains assessment questions.

GRAPHITE
Why is graphite so soft if it is made of only carbon?

Why is graphite so soft and diamond so hard if both are just made from carbon atoms?

CARBYNE
What is the difference between Carbyne and Graphite?

Is Carbyne the strongest material in the world?

COLLAGEN
What is the difference between collagen, gelatin and collagen hydrolysate?

In humans, collagen comprises one-third of the total protein, accounts for three-quarters of the dry weight of skin, and is the most prevalent component of the extracellular matrix

DIAMOND
Why is graphite so soft?

 Why is diamond so hard if it is made of the same substance as graphite?

FULLERENE
What are the structures of Fullerenes and Nanotubes?

Why is the fullerene and similar structures the cornerstone of nanotechnology? How big is a nanotube?

SALT -- NACL
Why does table salt have a cubic crystal shape?

3-D structure of NaCl. Page contains assessment questions.

BENZENE
What is the structure of the benzene molecule?

What is the geometry of the benzene molecule?

DNA STRAND
Why do carcinogens like benzene cause cancer?

HEMOGLOBIN-S MOLECULE
What causes Sickle Cell Anemia?

SODIUM NITRITE -- SODIUM NITRATE
What is the difference between sodium nitrite and sodium nitrate? -

Both are used as preservatives but there are significant differences between these compounds.

HOW DRUGS WORK--

How do drugs work?

How do drugs work? What is the molecular mechanism that causes side-effects?