Answer:
Hydrogen and Helium
Explanation:
Hydrogen was the most abundant element in the solar nebula, making up about 70% of its mass. It was in the form of gas and played a significant role in the formation of the Sun and the rest of the solar system. Helium was the second most abundant element in the solar nebula, accounting for approximately 28% of its mass. Like hydrogen, helium was present in gaseous form and contributed to the composition of the early solar system.
