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Hydrogen
Symbol: H
Atomic Number: 1
Helium
Symbol: He
Atomic Number: 2
Lithium
Symbol: Li
Atomic Number: 3
Beryllium
Symbol: Be
Atomic Number: 4
Boron
Symbol: B
Atomic Number: 5
Carbon
Symbol: C
Atomic Number: 6
Nitrogen
Symbol: N
Atomic Number: 7
Oxygen
Symbol: O
Atomic Number: 8
Fluorine
Symbol: F
Atomic Number: 9
Neon
Symbol: Ne
Atomic Number: 10
Sodium
Symbol: Na
Atomic Number: 11
Magnesium
Symbol: Mg
Atomic Number: 12
Aluminum
Symbol: Al
Atomic Number: 13
Silicon
Symbol: Si
Atomic Number: 14
Phosphorus
Symbol: P
Atomic Number: 15
Sulfur
Symbol: S
Atomic Number: 16
Chlorine
Symbol: Cl
Atomic Number: 17
Argon
Symbol: Ar
Atomic Number: 18
Potassium
Symbol: K
Atomic Number: 19
Calcium
Symbol: Ca
Atomic Number: 20