Question #c884b

1 Answer
Paul G.
Nov 17, 2017

2

Explanation:

Sulfur has 6 valence electrons (group VIA is a good shortcut here - the group number indicated the number of valence electrons for most group A elements)
by gaining two valence electrons, sulfur (atomic number 16) will resemble argon (atomic number 18).

another fun shortcut: sulfur is in the 3rd period p block (3p) 6th element from left to right ( its outermost orbital should read #3p^6#). by gaining two electrons it would gain the electron configuration #[Ne]3s^2##3p^8#

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