Answer:
Step-by-step explanation:
The universe is composed mostly of hydrogen and helium, which were produced in large quantities during the Big Bang. These two elements make up about 74% and 24% of the universe's elemental mass, respectively ¹. Other elements, such as oxygen, carbon, neon, nitrogen, magnesium, and silicon are also present in smaller quantities ¹. However, it is important to note that about 95% of the universe is made up of dark energy and dark matter, which are not well understood and are not composed of atoms like the other elements ².