Topic Details (Notes format)

Electron Configuration

Subject: Chemistry

Book: General Chemistry

Electron configuration describes how electrons are distributed in an atom’s orbitals. Following the Aufbau principle, electrons fill the lowest-energy orbitals first (1s before 2s, then 2p, 3s, 3p, etc.). Pauli’s exclusion principle states that no two electrons can have the same set of quantum numbers, while Hund’s rule emphasizes maximizing unpaired electrons in degenerate orbitals. Properly writing electron configurations (e.g., 1s^2 2s^2 2p^6 ...) is essential to understanding bonding, magnetism, and reactivity.

Practice Questions

What is the chemical formula for calcium phosphate?

View Question

What is the chemical formula for sodium oxide?

View Question

What is the chemical formula for sodium hypochlorite?

View Question

What is the common name for sodium bicarbonate?

View Question

What is the chemical formula for potassium dichromate?

View Question

Which element is the lightest in the periodic table?

View Question

What is the chemical formula for magnesium sulfate?

View Question

Which element has the highest electronegativity?

View Question

What is the chemical formula of carbon dioxide?

View Question

Which element is used in the production of rust?

View Question