Hydrogen is an element. So the only element in hydrogen is hydrogen.
Hydrogen and sulphur are the elements in H2S.
Hydrogen and oxygen are elements.
Hydrogen and oxygen are already elements. Elements do not contain other elements.
No. Hydrogen an oxygen are both elements. Elements do not contain other elements.
None. Hydrogen, oxygen, and carbon are all elements. Elements do not contain other elements.
Hydrogen monoxide is made of two elements, hydrogen and oxygen.
Polyethylene is made from the elements Carbon and Hydrogen only.
No. Both chlorine and hydrogen are elements. Elements cannot contain other elements.
Hydrogen can react with practically all other elements.
Hydrogen is an element (not elements) and yes it is present in novas.
Carbon, hydrogen, and oxygen
Hydrogen and oxygen are already elements. You don't get elements as a product. You get water, which is a compound.