Potassium

Potassium's symbol 'K' comes from 'kalium,' its Latin name, which traces back to the Arabic word 'qali' meaning plant ashes — because potassium was originally extracted from wood ash. Humphry Davy isolated it in 1807 using electrolysis, making it the first metal ever isolated by this method. Potassium is so soft you can cut it with a butter knife, and it reacts explosively with water, producing a beautiful lilac flame.

Potassium is crucial for your body — it helps your heart beat regularly and your muscles contract. Bananas are famous for their potassium content, but avocados and potatoes actually contain even more! Potassium compounds are used in fertilizers (the 'K' in NPK fertilizer), soap, and even some types of glass.

The symbol 'K' is a useful single-letter element in Spellement. While less common than some letters as a word starter, it kicks off words like 'key,' 'kind,' and 'know,' providing spellers with a distinctive consonant for creative element combinations.