2. The
of elements is important to
understand why elements combine to form molecules.
3. Although the electrons really orbit throughout the "
the electron orbits can be more easily explained with a
4. The lowest energy level holds just,
electrons.
5. The next level can hold up to
electrons.
6. The third level can hold up to
electrons.
7. All of the levels after can hold up to
electrons.
8. Oxygen has,
protons in the nucleus and therefore has
electrons
around the nucleus producing a net charge of zero.
9. Since oxygen has
electrons, it must have
electrons in its second
energy level.
10. Draw a picture of the element carbon.
11. Another way to draw this type of diagram is to
energy levels, just draw the
the "
the filled
energy levels, and stop drawing
"for the energy levels.
12. Elements are more stable when they have their energy levels
13. In order to fill their shells, compatible elements tend to
electrons.
14. The hydrogen atom would like
their
electron to fill its first energy level.
energy level.
15. The oxygen atom would like 2 more electrons to fill its
16. What would happen if just two hydrogen atoms came into contact?
17. In a water molecule each hydrogen atom thinks it has electrons filling its
outer shell and oxygen feels as though it has
electrons filling its outer
shell.