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.
Krypton was used as gas for energy saving fluorescent lights.
Used in some flash lamps for high speed photography.
Krypton fluoride is used in some lasers.