Step 1 : Introduction to the question "Which chemical element has the symbol K?"
...Chemical symbols make up the Periodic Table of known elements. Each chemical symbol represents an abbreviation for the chemical element's name. Most come from the Latin name for the chemical. In the case of potassium, the letter "K" represents it on the Periodic Table. Sir Humphrey Davy discovered potassium in 1807. The name for the element comes from the Latin word "kalium." Potassium is from the mineral carnallite and is often used in making glass and soap. Source: ChemicalElements.com