Potassium color: Silver- White
Symbol: K
# of Protons: 19
# of Neutrons: 21
# of Electrons: 19
Atomic Mass: 40
Atomic #: 19
Natural State: Solid
Group #: 1
Boiling point: 1,398 *F (758.8 *C); * = degrees
Melting point: 146.8 *F (63.38 *C)
Density: 0.89 g/cm3
Interesting facts:
Takes up about 2.40% of the weight of earth's crust
Is the 7th most abundant element
Can be used in an execution by lethal injection.
Found by: Humphry Davy
When?: 1807
Where?: England