Write the formula for each of the following compounds and indicate which ones are best described as ionic:
(a) Sodium hypochlorite
(b) Boron triiodide
(c) Aluminum perchlorate
(d) Calcium acetate
(e) Potassium permanganate
(f) Ammonium sulfite
(g) Potassium dihydrogen phosphate
(h) Disulfur dichloride
(i) Chlorine trifluoride
(j) Phosphorus trifluoride