What Is the Atomic Mass of Barium?

A chemical element name is abbreviated as an element symbol, which is a one- or two-letter abbreviation. When two letters make up a symbol, the first letter is usually capitalized, while the second letter is always lowercase.

The formula for the potassium metal is K.

Potassium is a Group  1 element. It is a soft white metal with a silvery sheen that has a low melting point and is a good heat and electricity conductor.