Carbon because Carbon is a common element contains in organic things. It contains a lot of atoms to form large molecules with Hydrogen and other elements as well...
You think probable to carbon.
Hydrogen is an element and an energy source itself.
No. Deuterium is not an element in and of itself. It is an isotope of hydrogen.
The H2 molecule is not usually considered a hydride; that term is usually restricted to compounds of hydrogen with at least one element that is less electronegative than hydrogen itself.
There is not single element in bicycle tires. The rubber itself is vulcanized rubber, which contains carbon, hydrogen, and sulfur.
carbon
You think probable to carbon.
Hydrogen is an element and an energy source itself.
itself
Hydrogen is, itself, a chemical element, and it is the most simple of all the elements. In hydrogen, one chemical element is present.
None whatsoever.. gold is an element itself!
No elements combine to produce carbon. Carbon is an element in and of itself.
Intermolecular bonds of water molecules are hydrogen bonds.
H2 technically does contain molecules. Or at least, molecule. H2 is two hydrogens covalently bonded, so that the lowest energy level is filled. Since H2 has two atoms (hydrogen and hydrogen), it is not an element, because there is more than one atom. H2 is a molecule itself. However, in context of nature, it is rare that you would ever find an H2 molecule on its own unless you were working with one in a laboratory. So, if you were considering the whole of an H2 gas, there would be many molecules of H2. Short answer: H2 is a molecule itself. Many H2 means there are many molecules of H2.
Unless there's a trick I don't know, NO. Water is 2 Hydrogen atoms and an Oxygen atom bound into a molecule. Lead is itself an element, not made up of Hydrogen, Oxygen, or any other elements.
NO!!!! Argon is Noble Gas. This means that it exists as monatoms. (One atom). It does not combine with anything.
No. Ammonia, NH3, is a compound of nitrogen and hydrogen.