Answer: Because the acre is a measure of area, it has no definite perimeter. For example, using the examples in question one, the perimeter of the long, skinny sidewalk acre would be 17,434 feet (more than 3 miles), but the perimeter of the square acre would be 835 feet.
No other molecular fluoride of krypton has been isolated, so all krypton compounds are derived from KrF 2, where Kr is in the +2 oxidation state. Krypton difluoride is a powerful oxidative fluorinating agent. (Its oxidizing power means that it extracts electrons from other substances and confers on them a positive charge.
Krypton has atomic number 36 and electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 or simply, [Ar] 3d10 4s2 4p6 The electron configuration of krypton is: [Ar]3d10 4 â¦ s2 4p6.