. an element with the valence electron configuration 3s1 would form a monatomic ion with a charge of fill in the blank 1 1 . in order to form this ion, the element will gain 1 electron(s) from/into the s subshell(s). b. if an element with the valence configuration 4s23d6 loses 3 electron(s), these electron(s) would be removed from the d subshell(s).