Molecular Geometry: The 3D Shape of Chemistry
Why the shape of a molecule decides what it does
Why the shape of a molecule decides what it does
Every molecule is built from atoms connected by bonds. Bonds form when atoms share electrons to become more stable. The number of bonds an atom can form depends on how many electrons it needs. Click an element to learn more.
Click an element below to see its bonding behavior.
Electron pairs repel each other and spread as far apart as possible (VSEPR theory). The number of bonds and lone pairs around a central atom determines the molecule's 3D shape. Click each shape to see it.
Linear: atoms in a straight line, 180 degree bond angle.
Some molecules shaped the world. Click each one to see its structure and why it matters.
A single glass of water contains more molecules than there are glasses of water in all the oceans on Earth. About 8 x 10^24 molecules.
When electrons are not shared equally across a molecule, it becomes polar: one end is slightly negative, the other slightly positive. This determines whether a substance dissolves in water, its boiling point, and how it interacts with other molecules.
Water is bent, so the charge is uneven. This makes it an incredible solvent.
You've explored how atoms bond, why molecules take specific shapes, and how that geometry determines everything from the smell of vanilla to the strength of diamond.
Atoms share or transfer electrons to fill their outer shell. This drive to be stable creates every molecule in existence.
Electron pairs around a central atom push away from each other as far as possible, creating predictable 3D shapes.
Water is bent, not linear. That bend makes it a universal solvent, gives ice its float, and makes life possible.
When a molecule is not symmetric, electrons crowd to one side, creating a positive and negative end. That is polarity.
Put your new knowledge into practice!