The elements of group 5a, the nitrogen family, form compounds with hydrogen having the boiling points listed below: sbh3 -17°c, ash3 -55°c, ph3 -87°c, nh3 -33°c the first three compounds illustrate a trend where the boiling point decreases as the mass decreases; however, ammonia (nh3) does not follow the trend because of

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na