Ionic Bonding How a light silvery metal and a greenish yellow gas end up tasting good on popcorn

General Info  Atoms are neutral if the number of electrons equal the number of protons

General Info  Rule of 8: Atoms are happy when their outer shell has 8 electrons.  4 exceptions: H, He, Li, Be  Why are these exceptions?

General Info  Atoms want to have their outer shell full.  They will gain, lose or share electrons to have this happen  When atoms gain or lose electrons, they become an ion

IONS  Ions are atoms that have an electrical charge  If an atom gains an electron, it will have a - charge  If it gains 2 electrons, it will have a 2- charge

IONS  If an atom loses an electron, it will have a + charge  If it loses 2 electrons, it will have a 2+ charge

IONIC BONDING  When atoms lose electrons, the electrons go to another atom, they just do not float off into space  The - ion is attracted to the + ion. (remember opposites attract)

IONIC BONDING  That attraction forms what scientists call an ionic bond.  An ionic bond always forms between a metal and a nonmetal

 The metal is always the + ion and the nonmetal is always the negative ion  The end charge of an ionic bond must always be 0. The + charges must = the - charges IONIC BONDING

The point of bonding is so that all the atoms have a complete outer shell. Atoms will lose or gain electrons to get to the nearest complete shell. When an atom gains or loses electrons it becomes an ion. Hence the term ionic bonding.

Atom

Ion

Atom

Ion

Make the following ions. Fluorine Chlorine Oxygen Aluminum Potassium Magnesium Be sure to show the charge of the ion.

How to draw an Ionic Bond  Draw the elements by themselves  Draw arrows for each of the electrons that will be moved  Draw the atoms again with the electrons in their new locations  Show the ions with a positive or negative sign

Lithium and chlorine

Lithium Chloride

Make the following ionic compounds Sodium and Chlorine Calcium and Oxygen Sodium and Oxygen Magnesium and Fluorine