No. They are two different elements.
Yes
hydrogen is but not oxygen
An element is only made of the same type of atoms. Ex. oxygen is an element, and it is only oxygen atoms, nothing else. If there's both hydrogen and oxygen atom it is H2O, which is a compound.
Hydrogen is a pure element just like oxygen. This means that they only contain one element.
No, Hydrogen is an element and hydroxide is a compound made by oxygen and hydrogen (OH-)
No because Oxygen is an element and it only contains atoms of Oxygen and nothing else, no Hydrogen at all. A compound of Hydrogen must contain Hydrogen plus something else. Water contains Hydrogen and Oxygen (H2O) so that would be a compound of Hydrogen and oxygen.
Oxygen and Hydrogen
hydrogen is the lightest element
Hydrogen peroxide is a compound composed of hydrogen and oxygen atoms (H2O2). It is not an element.
No. It is a compound made of hydrogen and oxygen. An element is not made of any other elements.
Carbon is not an element of water. Water is composed of hydrogen and oxygen. Carbon is a separate element.
Water is not an element, it is a compound composed of hydrogen and oxygen.