The first 20 of the periodic table - 🤓👆

• 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
• Sulphur


  Symbol: S

  Atomic number: 16
• Chlorine


  Symbol: Cl

  Atomic number: 17
• Argon


  Symbol: Ar

  Atomic number: 18
• Calcium


  Symbol: Ca

  Atomic number: 20
• Pottasium

  Symbol: K

  Atomic number: 19