Question

The most abundant element in the universe is _______.

Answer 1

The most abundant element in the universe is Hydrogen $\left(\mathrm{H}\right)$.

• The most abundant element in the earth's crust is Oxygen $\left(\mathrm{O}\right)$.
• The second most abundant element in the earth's crust is Silicon $\left(\mathrm{Si}\right)$

Therefore, the most abundant element in the universe is hydrogen.