1. What is Electron Configuration Notation?

Electron configuration notation describes the distribution of electrons in an atom's orbitals. It follows the format of principal quantum number (n), orbital type (s, p, d, f), and number of electrons (superscript).

2. How Does the Calculator Work?

The calculator provides the standard electron configuration for elements 1-36 (Hydrogen to Krypton):

Rules followed:

• Aufbau Principle: Electrons fill orbitals from lowest to highest energy
• Pauli Exclusion Principle: Maximum 2 electrons per orbital with opposite spins
• Hund's Rule: Orbitals of equal energy are occupied singly before pairing

3. Importance of Electron Configuration

Details: Electron configuration determines an element's chemical properties, reactivity, and position in the periodic table. It explains periodic trends like atomic radius, ionization energy, and electronegativity.

4. Using the Calculator

Tips: Simply select an element from the dropdown menu and click "Calculate" to see its electron configuration notation.

5. Frequently Asked Questions (FAQ)

Q1: Why does 4s fill before 3d?
A: Although 4s has a higher principal quantum number, its energy level is actually lower than 3d for most atoms, so it fills first.

Q2: Why are there exceptions like Chromium and Copper?
A: These elements have half-filled or completely filled d subshells which are more stable configurations.

Q3: How do I write noble gas notation?
A: Replace the beginning of the configuration with the previous noble gas in brackets (e.g., [Ar]4s² for Calcium).

Q4: What about elements beyond Krypton?
A: The pattern continues with additional orbitals (5s, 4d, 5p, etc.), but exceptions become more common.

Q5: How does this relate to the periodic table?
A: The periodic table is organized by electron configurations - groups (columns) have similar outer electron configurations.