Does a atom power a star

Yes, Fusion is the process where two hydrogen atoms combine to form a helium atom, releasing energy. Fusion will power the star for 90% of its lifetime.

Answer: yes

Explanation: All atoms larger than hydrogen and helium have been made within the thermonuclear furnace of a star, powered by nuclear fusion. This is the process in which smaller atoms, i. e., hydrogen and helium, are smashed together to form larger elements, such as carbon.