Intermolecular forces

Have you ever wondered how a gecko can walk straight up a wall? Somehow the molecules in the gecko's feet stick to the molecules in the wall enough to lift the lizard but not so strongly that it gets stuck in place. These inter-molecular attractions (i.e. attractions between molecules) help to explain everything from why some substances have high boiling points to how your immune system recognizes molecules of dangerous pathogens. Many important microscropic structures in your body are built from groups of molecules attracting to each together. Hemoglobin and cell membranes are just two examples. The nature of these inter-molecular attractions is the focus of this activity.

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