Ionic Bonding

[13gmorris]

Potassium chloride is an ionic compound containing potassium ions bonded to chloride ions
A. Name the force that holds the ions together in an ionic compound. State if it is weak or strong
B. The electronic configuration of potassium is 2,8,8,1 deduce the formula of a potassium ion
C. The electronic configuration of chlorine is 2,8,1 deduce the formula of a chloride ion

[fiction-factory]

Some more hints.
A) The answer may make your hair stand on end when you see it
b) there is one electron in the outer ring. i'm positive of that
C) Also one in outer shell. Opposites attract (Paula Abdul?)