What are the chemical elements of universe?
Hydrogen & Helium. They are the lightest elements created by Big Bang nucleosynthesis ages ago. Almost all other elements found in nature, including some further hydrogen and helium created since then, were made by various natural or (at times) artificial methods of nucleosynthesis, including occasionally by activities such as nuclear fission. In total, 117 elements have been observed as of 2008, of which 92 occur naturally on Earth. The rest are derived artificially.
