Answer :
Final answer:
Krypton is a nonmetal that is part of the noble gases. It is isolated through fractional distillation of liquefied air. Krypton's electron configuration is 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6, indicating a complete valence shell, which explains its lack of reactivity and its ability to form a compound, such as krypton difluoride, with fluorine.Therefore,correct option is option(2).
Explanation:
Krypton is a nonmetal. It is a member of the noble gases, which are found in Group 18 of the periodic table. Krypton, being a noble gas, is characterized by its lack of reactivity under normal conditions due to its complete valence electron shell. The element is isolated through the fractional distillation of liquefied air, a process that separates gaseous components based on their boiling points.
Fluorine can react with krypton to form krypton difluoride (KrF2). This occurrence is because fluorine is highly electronegative and can remove an electron from krypton's filled shell, forming a compound with a formal oxidation state of +2.
The electron configuration of Krypton (Kr) is 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6. This configuration shows that krypton has a filled 4p subshell, completing its outermost shell and contributing to its stability and gaseous state at room temperature.
