Question

18/20
stars are made mostly of which two elements?
iron and potassium
mercury and strontium
hydrogen and helium
krypton and bismuth

Explanation:

Stars are formed from large clouds of gas and dust in space. Through nuclear fusion processes, hydrogen atoms combine to form helium, releasing energy. This is the main process that powers stars. Hydrogen and helium are the most abundant elements in stars due to these nuclear reactions and the initial composition of the stellar - forming material.

Answer:

Hydrogen and helium