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 ...

1st Period: Hydrogen and helium—Electrons go into the first energy level. After the first level has two electrons, the next electron goes into the second level. 2nd Period: Lithium to neon—Electrons ...

Like carbon, silicon has four electrons in its outermost electron shell, so it can ... The band gap is the energy difference between the highest energy level or "top" of the valence band (that ...