Electron Configuration Calculator

Element Electron Configuration

Element:

Atomic Number:

Charge (for ions):

Quantum Numbers Calculator

Electron Number:

Atomic Number:

Valence Electrons

Element Symbol:

Or Atomic Number:

Noble Gas Configuration

Atomic Number:

Electron Configuration Reference

Aufbau Principle & Rules:

Aufbau Principle:

Electrons fill orbitals starting with the lowest energy level first.

Pauli Exclusion:

No two electrons can have the same set of four quantum numbers.

Hund's Rule:

Electrons singly occupy orbitals before pairing up.

Orbital Filling Order:

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f¹⁴ 6d¹⁰ 7p⁶

Quantum Numbers:

Principal (n):

Energy level/shell (1, 2, 3, ...)

Angular (ℓ):

Subshell shape (0=s, 1=p, 2=d, 3=f)

Magnetic (mₗ):

Orbital orientation (-ℓ to +ℓ)

Spin (mₛ):

Electron spin (+½ or -½)

Orbital Capacities:

s orbital
2 electrons

p orbitals
6 electrons

d orbitals
10 electrons

f orbitals
14 electrons

⚛️ Electron Configuration Calculator

Element Electron Configuration

Quantum Numbers Calculator

Valence Electrons

Noble Gas Configuration

Electron Configuration Reference

Aufbau Principle & Rules:

Aufbau Principle:

Pauli Exclusion:

Hund's Rule:

Orbital Filling Order:

Quantum Numbers:

Principal (n):

Angular (ℓ):

Magnetic (mₗ):

Spin (mₛ):

Orbital Capacities: