How many electrons are present in the last occupied sublevel of krypton?

Answer 1

Eight.

Krypton is a noble gas. All noble gases have their valence shells, i.e. their outermost #"s"# and #"p"# sublevels, filled with eight electrons. The representative elements react in order to achieve an octet of electrons in their valence shells, making them stable. Krypton's valence shell has the electron configuration of #"4s"^2"4p"^6"#. Since it already has an octet in its valence shell, it is already stable as a single atom.

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Answer 2

Avery Adams

The last occupied sublevel of krypton is the 4p sublevel. It can hold a maximum of 6 electrons. Therefore, there are 6 electrons present in the last occupied sublevel of krypton.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.