Example: sodium has the electron arrangement 2,8,1. An atom of sodium has 11 electrons. The first two fill the innermost energy level. The second energy level is also full, holding eight electrons ...

The reaction releases a lot of heat as the ionic compound sodium chloride is formed. A sodium and chlorine atom are near each other. An electron from each atom feels the attraction from the other atom ...

Sodium is in group 1. A sodium atom has one electron in its outer shell. The atom is more stable if it has a full outer shell. A sodium atom can lose its outer electron. It will still have 11 ...

Since this atom has ... the next electron goes into the second level. 2nd Period: Lithium to neon—Electrons go into the second level. After the second level has 8 electrons, the next electron goes ...