which of the following symbols would be included in the noble - gas notation for an element that had valence…

which of the following symbols would be included in the noble - gas notation for an element that had valence electrons in the 5s subshell?\nar\nkr\nxe\nrn

which of the following symbols would be included in the noble - gas notation for an element that had valence electrons in the 5s subshell?\nar\nkr\nxe\nrn

Answer

Brief Explanation:

Noble - gas notation uses the symbol of the nearest noble gas with a lower atomic number. The 5s sub - shell starts after the noble gas Kr (krypton). So, Kr would be used as the noble gas core in the noble - gas notation for an element with valence electrons in the 5s sub - shell.

Answer:

B. Kr