The atoms bond because there is a strong enough attraction in both directions and room for the electrons in the outer energy level of the atoms. When two hydrogen atoms and an oxygen atom get close ...

Do not attempt to perform this demonstration. The combustion of methane is an example of an exothermic reaction. More energy is released when the bonds in the products are formed than is used to break ...

Although this lesson plan was developed primarily for grades ... birds must overcome the tremendous energy demands of flying. Methods for meeting those energy demands are almost as diverse as ...