Answer:
a)Boron and Flourine 3. b) Carbon and Hydrogen 4. c) Sulfur and Oxygen 3. d) Nitrogen and Flourine 3. e) Nitrogen 2 and Oxygen 4. f) Chlorine 2 and Oxygen 5. g) Phosphorus and Chlorine 3. h) Hydrogen 2 and Oxygen 2. i) Boron and Chlorine 3 . j) Oxygen and Chlorine 2