Based on the clue 'all 5 elements of the salt producing halogen group...', what is the answer?

Based on the clue 'all 3 of the romanov czars named alexander reigned...', what is the answer? Based on the clue 'all 3 of these monster sisters had snaky hair not ...', what is the answer? Based on the clue 'all 3 seasons of this show with jason bateman tryi...', what is the answer? Based on the clue 'all 435 square miles of it lie between the adirond...', what is the answer? Based on the clue 'all 5 of rhode islands counties are on this bay', what is the answer? Based on the clue 'all 5 rhode island counties have shorelines on thi...', what is the answer? What is associated with: all 6 examples of his signature known to exist date from between 1612 1616? What is associated with: all 6 noble gases were discovered on earth between 1894 1900 this one symbol rn was the last?