All of the substances listed in the question are gases at standard temperature and pressure.
Hydrogen (80%)Helium (19%) Methane (1.5%) Hydrogen deuteride (0.02%) Ethane (0.00015%).
The composition of Neptune's atmosphere is 80 percent hydrogen, 19 percent helium and 1 percent methane. In addition, there are trace amounts of ethane and hydrogen deuteride.
It is made of 96.3% hydrogen and 3.25% helium, as well as small amounts of methane, ammonia, hydrogen deuteride, ethane, water, and ammonia hydrosulfide.
Neptune's minor atmospheric gases are ethane and hydrogen deuteride. Its major gases are hydrogen, helium, and methane. Neptune's blue appearance is caused by the mixture of these gases.
89.8±2.0% Hydrogen (H2) 10.2±2.0% Helium ~0.3% Methane ~0.026% Ammonia ~0.003% Hydrogen deuteride (HD) Save 0.0006% Ethane 0.0004% water
The main components are:Hydrogen (96%), Helium (3%), Methane (0.4%), Ammonia (0.01%), Hydrogen deuteride (0.01%), Ethane (0.0007%).Hydrogen deuteride is a compound made from one atom of hydrogen and one of deuterium (an isotope of hydrogen with a proton [1H - 2H] rather than the more familiar [1H - 1H].
Saturn's atmosphere is made up of 96% hydrogen, 3% helum, .4% of methane, .01% of ammonia, .01% of Hydrogen Deuteride and .0007% Ethane.
While Neptune is made of mostly hydrogen and helium, its atmosphere does include three other gases. Methane, hydrogen deuteride, and ethane make up just barely over 3 percent of the planet's atmosphere.
Hydrogen (89.8%),Helium (10.2%),Ammonia (0.3%),Hydrogen deuteride (0.003%),Ethane (0.0006%)Water (0.0004%)
Jupiter has gases. It's composition consists of hydrogen (~90%), helium (~10%), methane (~3000ppm), ammonia (~260ppm), hydrogen deuteride (~28), ethane (~5.8ppm), water (~4ppm), and trace amounts of ammonia ice, water ice, and ammonia hydrosulfide.
Jupiter's atmosphere is mainly Hydrogen (around 90%), Helium (around 10%), with small amounts (minor gases) of Methane (around 0.3%), Ammonia (0.026%), Hydrogen Deuteride (0.003%), Ethane (0.0006%) and Water vapour (0.0004%).
Neptune in the last of the gas giant planets..so gas.