1.   A methyl group is a carbon with three hydrogen atoms attached.

2.   It consists of a chain of carbon atoms, with one hydrogen atom attached to each carbon.

3.   The optimum proportions of hydrogen and oxygen are thus two hydrogen atoms per oxygen atom, exactly the same as in water.

4.   This is about the energy that would be released if a hydrogen atom could be totally converted into energy.

5.   Hydrogen atoms are removed under the influence of the enzyme dehydrogenase.

6.   By supplying addition molecules of chlorine it is possible to replace all the hydrogen atoms.

7.   That is the fusion of hydrogen atoms in a cold solution.

8.   At such high temperatures, hydrogen atoms in the sun fuse together to form helium.

9.   Benedetti found that under extreme pressure the bonds holding the hydrogen atoms onto the carbon dissolved, and the carbon atoms began binding to one another.