Why is hydrogen, helium, ammoia, and methane more abundant in the outer planets than the inner panets?

Question

PLEASE HELP ME!!!!!!!!!!!!!!!!!

Answer 1

in a warm state they are gasses and are free to be released, burned off or combine to create other compounds. The plantes further from the sun are cooler, these gases have a very low freezing point, this allows them to be frozen and retained on the other planets in greater quantities.

Answer 2

I think that during the formation of the solar system by accretion from a cloud of dust and gases, the inner solar system was too hot for condensation of compounds like ammonia, methane, etc. Likewise, lightweight elements like helium and hydrogen couldnt' condense near the sun. These all tended to stay in the outer solar system where things cooled more quickly. Compounds with high melting points, like metals, were retained in the inner solar system.

Answer 3

Gases are lighter than rock and were blown to the outer reaches of the solar system by the solar wind. This is why you have the rocky planets closer in to the sun, and the gas planets farther out.