K (Potassium).

Just to inform you that this post is non-potassium related at all. Figure the title out.

It has been quite a long time since I last heard a ballad from K-artists.

Now I question the relevance of this post.

Since I mentioned about potassium earlier on, let's check K out.

• It's represented by a "K", a letter that doesn't appear in the element's name at all, but is based on the German word "Kalium".
• It is a very soft, light silvered colored metal that tarnishes quickly in air into a gray color. 
• When it is burned, the flame is a light purple. 
• Before the 19th century, it was thought that sodium and potassium were the same. 
• It is an electrolyte, it helps conduct electricity in the body, as does sodium, calcium, chloride, and magnesium.