Madelung's Rule Explained
Understanding Madelung's Rule: Order of Filling Atomic Orbitals

Learn about Madelung's rule and its importance in determining atomic orbital filling order in chemistry.

Energy Levels
Why Electrons Fill 4s Before 3d: Understanding Orbital Energy Levels

Discover why electrons occupy the 4s orbital before the 3d orbital due to energy differences and stability in atoms.

Atomic Configurations Mastery
Effective Strategies to Remember Atomic Configurations

Discover effective techniques to memorize atomic configurations easily, including the Aufbau Principle and helpful mnemonics.

Third Shell: 8 or 18?
Understanding the Third Shell: How Many Electrons Does It Hold?

Learn about the third shell of an atom and its capacity to hold electrons. Discover the Aufbau principle and electron configuration.