A. An element with the valence electron configuration 4s2 would form a monatomic ion with a charge of . In order to form this ion, the element will (lose/gain) (#) electron(s) from/into the subshell(s). B. An element with the valence electron configuration 2s^2 2p^4 would form a monatomic ion with a charge of . In order to form this ion, the element will (lose/gain) # electron(s) from/into the subshell(s).