A Lewis diagram shows how the valence electrons are distributed around the atoms in a molecule. Shared pairs of electrons are drawn as lines between atoms, while lone pairs of …

Learn about chemical bonding, Lewis diagrams, resonance and formal charge, VSEPR, and more. Practice what you’ve learned and study for the AP Chemistry exam with more than 85 …

Compounds can be classified as ionic or covalent. Molecules are the simplest unit of a covalent compound, and molecules can be represented in many different ways.

A compound is a substance made of two or more different elements that are chemically combined in a fixed ratio. When compounds exist as individual molecules—like carbon dioxide or …

Here's some of the guidelines for drawing dot structures. So let's say we wanted to draw the dot structure for this molecule, so silicon tetrafluoride. The first thing we would need to do is to find …

Explore the molecular structure of glucose and its role in biology with Khan Academy's comprehensive educational video.

And so if I were to draw one of these diagrams, it would look something like this. Let me draw the bromide first. So I have a bromide anion, I have another bromide anion, another bromide …

Let's explore the principle of a compound microscope and then logically build one, step by step.

Explore the notion of a "sample space". See a sample space represented as a tree diagram, table, and list.

Representing structures of organic molecules using line (or line-angle) diagrams.