Answer:
Jupiter:43,441 mi, 317.8 M,–600 kPa, and composed of a mixture of hydrogen, helium and much smaller amounts of methane and ammonia.
Saturn:36,184 mi,95.16 M,140 kPa,hydrogen (H2) and helium (He)
Uranus:15,759 mi,14.54 M, 1 bar pressure level ,hydrogen, followed by helium and a little methane.
Neptune:15,299 mi,17.15 M,7 Mbar (700 GPa),mostly hydrogen, with smaller amounts of helium and methane.
Explanation: