Water! Water molecules contain 2 atoms of Hydrogen and one of Oxygen
There is lots of hydrogen in the US. It is the most abundant substance in the universe.
Hydrogen: stars universes every thing has it
Tritium is the most abundant hydrogen isotope
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.
The question is flawed. Substance can mean element or molecule. I'll go with molecule since organic simply means carbon atoms are present. Hydrogen dioxide is the most abundant inorganic "substance".
Hydrogen is the most abundant element in the universe.
Hydrogen is the most abundant element in the universe.
Hydrogen is the most abundant element in the universe.
Hydrogen is the most abundant element in the universe.
That is hydrogen.
The most abundant element in the universe is hydrogen.
Mind is the second most abundant substance in the human body