Krypton's symbol, Kr, comes from the first and third letters of the element's name.

Krypton's boiling point is about −153°C, so it remains a gas under ordinary indoor conditions.

Krypton difluoride is one of the few well-established krypton compounds, showing that noble gases are not universally unreactive.

Krypton-fluoride excimer lasers emit 248-nanometer ultraviolet pulses, which are useful for precision semiconductor lithography.