In electrolysis, an electric current is passed through a molten (melted) compound.
The electrical current breaks the compound into its elements.
(See sidebar on Davy in the calcium entry in Volume 1.) There are very few uses for potassium as a pure element.
The isotope uranium 238 is used to estimate the age of the earliest igneous rocks and for other types of radiometric dating.
The most logical explanation is that the water source originates somewhere higher, likely in the White Mountains some forty miles away.
The fact that Tourmaline Spring Water travels so far, deep beneath some of the most pristine forest in North America may explain why our water is so uncommonly pure, just as it bubbles from the ground.
The alkali metals also include lithium, sodium, rubidium, cesium, and francium. Potassium is so active that it never occurs free in nature.
It always occurs in compounds, combined with other elements.