Electron Configuration Explorer
Visualize how electrons fill orbitals using the aufbau principle, Hund's rule, and Pauli exclusion.
Hydrogen
Z = 1, s-block
Period 1
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Elements
Period 1
Period 2
Period 3
Period 4
Block:
s-block
p-block
d-block
Step 1 of 6
The Element
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About This Element
Hydrogen (H), Z = 1
Period 1, Group 1, s-block
1 valence e-1 unpaired
Key Principles
Aufbau Principle
Fill lowest energy orbitals first.
Pauli Exclusion
Max 2 electrons per orbital, with opposite spins.
Hund's Rule
Fill all orbitals in a subshell singly before pairing.
Step 1 of 6
The Element
←/→to navigate
swipe to navigate
About This Element
Hydrogen (H), Z = 1
Period 1, Group 1, s-block
1 valence e-1 unpaired
Key Principles
Aufbau Principle
Fill lowest energy orbitals first.
Pauli Exclusion
Max 2 electrons per orbital, with opposite spins.
Hund's Rule
Fill all orbitals in a subshell singly before pairing.