Answer: Noble-gas notation of Sn contains Kr.
Explanation: Tin ( Sn) is an element having atomic number 50.
Nearest noble gas to this element is Krypton which has an atomic number 36.
Electronic configuration or noble-gas notation for Sn is written as :
[tex]Sn=[Kr]4d^{10}5s^25p^2[/tex]
As seen from above, Noble gas Krypton having symbol 'Kr' is coming in the electronic configuration for Tin.
