Atomic symbol: K
Atomic number: 19
Atomic mass: 39.10
Appearance: soft, silvery white solid at 25°C
Series: Alkali metals
Electron configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4p¹
Potassium burns with a lilac flame.
Highly reactive, not found free in nature.
Fun Fact! In the human body, a potassium deficiency, known as hypokalemia, can be fata; potassium is essential to life.