SOLAR SYSTEM

Detailed explanation-1: -The Solar Nebula model of the formation of the Solar System shows that the most abundant gases which were present in this original nebula were Hydrogen and Helium.

Detailed explanation-2: -Of these, hydrogen is by far the most abundant element in the solar system and in the universe. The sun is mostly made of hydrogen.

Detailed explanation-3: -Hydrogen is the most abundant element in the Universe. It is present on Earth in great quantities combined with other elements.

Detailed explanation-4: -Hydrogen and helium gas were the most abundant by far, comprising about 98% of the solar nebula.

Detailed explanation-5: -Hydrogen is the most abundant element in the Universe; helium is second.

Detailed explanation-6: -Mostly the stuff of the cloud was simple atoms of hydrogen and helium, but it was peppered here and there by more complicated elements forged in the internal furnaces and death explosions of older stars.