Krypton
Kr
Krypton Krazy
Krypton's symbol is Kr. It's atomic number is 36 and it's atomic mass is 83.80. Krypton is located is period 4 and group 18. It's group name is known as the Nobel gases. Krypton's state of matter is a gas and it is a non-metal.
Fluorescent light
Krypton was used as gas for energy saving fluorescent lights.
Flash lamps
Used in some flash lamps for high speed photography.
Laser
Krypton fluoride is used in some lasers.