Answer this correctly and I am here 2 give u 10 points.......?

Krypton is pretty huge as atoms go--that is, its outermost electrons are really far from the nucleus (and therefore, not held very tightly).

Flourine has the highest electron affinity of any atom--getting that one more electron gives them a full valence shell.

As long as there is a little bit of an energetic 'nudge' (if the reactants run in to each other at a high temperature) then the krypton will react with 2 flourine atoms, forming krypton difluoride

actually flourine has the highest electron affinity

i knew that u would know that

and krypton has the least power i mean the energy required to remove the electron will be less because the las electron will be at a great distance from the nucleus

therefore at temperture of nearly 200deg celsius this is formed

Krypton (Greek, ???pt?? meaning "hidden") is neither green nor a solid material that can defeat Superman. It was discovered in Great Britain, 1898 by Sir William Ramsay and Morris Travers in residue left from evaporating nearly all components of liquid air. It ranks sixth in abundance in the atmosphere. Krypton gas is used in various kinds of lights, from small bright flashlight bulbs to special strobe lights for airport runways.

Krypton is characterized by a brilliant red and orange spectral signature. It is one of the products of uranium fission. Solidified krypton is white and crystalline with a face-centered cubic crystal structure which is a common property of all "rare gases".

As with the other noble gases, krypton is isolated from the air by liquefaction.

In 1960 an international agreement defined the meter in terms of light emitted from a krypton isotope. One of the naturally occurring non-radioactive isotopes of krypton, Kr-86 (17.3%) was used as the basis for the international definition of the meter. One meter was 1,650,762.73 wavelengths of the red-orange spectral line of krypton-86. This agreement replaced the longstanding standard meter located in Paris which was a metal bar made of a Platinum-iridium alloy (the bar was originally estimated to be one ten millionth of a quadrant of the earth's polar circumference). But only 23 years later, the Krypton-based standard was replaced itself by the speed of light—the most reliable constant in the universe. In October 1983 the Bureau International des Poids et Mesures (International Bureau of Weights and Measures) defined the meter as the distance that light travels in a vacuum during 1/299,792,458 seconds.

They are not completely inert.

See

http://en.wikipedia.org/wiki/Noble_gas#Compounds