atomic-structure
Anion vs Cation: What’s the Difference?A cation is a positively charged ion formed by losing electrons; an anion is negatively charged and forms by gaining them. Compare charges, examples and uses.
How to Write Electron Configurations (Step by Step)Learn how to write electron configurations step by step. Master the Aufbau order, Pauli and Hund rules, noble-gas shorthand, and the Cr and Cu exceptions.
What’s the Difference Between an Atom and a Molecule?An atom is the smallest unit of an element; a molecule is two or more atoms bonded together. Here is a clear, example-rich guide to how they differ and relate.