Krypton (Kr)
Superman's kryptonite is made up, but krypton gas is real!
Krypton facts
- Symbol
- Kr
- Atomic number
- 36
- Atomic mass
- 83.798
- Family
- Noble gases
- Period
- 4
- Group
- 18
What does krypton react with?
Krypton makes a new substance with 1 other element or chemical in our lab:
- Krypton + FluorineKrypton difluoride Kr + F₂ → KrF₂ · Only in a special research lab · Try it
Nothing happens when it's simply mixed with 97 of the others. 21 pairings have never been tried, because not enough atoms have ever existed.