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H
Hydrogen
He
Helium
Li
Lithium
Be
Beryllium
Ne
Neon
Na
Sodium
Mg
Magnesium
Ar
Argon
K
Potassium
Ca
Calcium
Kr
Krypton
Rb
Rubidium
Sr
Strontium
Xe
Xenon
Cs
Caesium
Ba
Barium
Rn
Radon
Fr
Francium
Ra
Radium