Which electron configuration is correct for a boron ion?
(1) 2
(2) 2-3
(3) 2-8
(4) 2-2-1

Achemist reacted 57.50 grams of sodium metal with an excess amount of chlorine gas. the chemical reaction that occurred is shown. na + cl2 → nacl if the percentage yield of the reaction is 86%, what is the actual yield? show your work, including the use of stoichiometric calculations and conversion factors.