How Do We Get It? – Radon. Radon: The Mysterious Element Below Our Feet. Have you ever looked at the periodic table and wondered about the strange elements it contains? One such element is radon (Rn), a gas that is not only fascinating but also has its own unique story. In this article, we’ll explore how radon is formed, its properties, and why it’s something worth knowing about, especially for teens interested in science!