argon because it is a noble gas and noble gasses are the least reactive of all groups.
sincerely a 13 year old.
Carbon
The correct answer is Carbon and Hydrogen
Carbon, Hydrogen, and oxygen
No. It is hydrogen.
Carbon (after hydrogen, helium and oxygen).
They are each an element A hydro-carbon is a compound
No hydrogen is the lightest element.
Carbon and hydrogen.
Carbon, though theoretically Silicon could work too, and in reality, we have found Arsenic based life
Carbon
The correct answer is Carbon and Hydrogen
Carbon, Hydrogen, and oxygen
Carbon, Hydrogen, and Oxygen in a ration of 1:2:1
The first element in the periodic table of Mendeleev is hydrogen, not carbon.
carbon i think
Hydrogen.
No, hydrogen is an element. Alkanes are a class of compounds containing both hydrogen and carbon.