hydrogen
No, it is the most common dissolved ion in the ocean. The most common element by mass is oxygen as the ocean is still mostly water.
Hydrogen I think.
Magnesium.
magnesium
Oxygen is most abundant element .
The most abundant element where? It is the most abundant element in Earth's crust. The most abundant element on planet Earth, on the other hand, is iron, while the most abundant element in the Universe is hydrogen.
aw
The most abundant element in the universe is hydrogen.
Hydrogen is the most abundant element in the known Universe; helium is second.
Oxygen is the most abundant element in the Earth's crust.
Hydrogen is the most common element in the universe, and in the Sun.
The most abundant element in the universe is hydrogen.