Things to Think About!

Here is a movie showing how potassium (K) reacts vigorously with water. Potassium is an alkali metal.

Below are some pictures of neon signs. Neon is an inert gas that glows red/orange when a high voltage is applied to it. Today over 150 different colors are available in "neon" signs, although only the orange/red color is neon. However, because of neon's role in making the signs famous, they are all called neon signs. Other noble gases, such as argon (seen below in dolphin sign), are also used.