Question

question 1-1
________ are the two elements, which formed in the first minutes after the big bang, that make up almost all observable matter in the universe. elements other than these remnants of the big bang continue to form within the cores of stars.

• hydrogen and helium
• carbon and helium
• uranium and iron
• iron and oxygen

Explanation:

The first two elements formed moments after the Big Bang, composing nearly all observable matter in the universe, are hydrogen and helium. Heavier elements are later synthesized in stellar cores.

Answer:

Hydrogen and helium