Sodium is a chemical element with the symbol Na and atomic number 11. It is a soft, silver-white, highly reactive metal and is a member of the alkali metals; its only stable isotope is ²³Na.Symbol: Na
Electron configuration: Ne 3s1
Atomic number: 11
Melting point: 207.9°F (97.72°C)
Discovered: 1807
Atomic mass: 22.989769 ± 0.00000002 u
Discoverer: Humphry Davy

Potassium is a chemical element with symbol K and atomic number 19. Elemental potassium is a soft silvery-white alkali metal that oxidizes rapidly in air and is very reactive with water, generating .Symbol: K
Electron configuration: [Ar] 4s1
Atomic number: 19
Atomic mass: 39.0983 ± 0.0001 u
Discoverer: Humphry Davy
Drug class: Potassium Salt

2nd

3rd