The formation of an ionic bond involves the what?

Answer is: transfer of electrons.
Ionic bond is the electrostatic attraction between oppositely charged ions.
For example, compound magnesium chloride (MgCl₂) has ionic bond.
Magnesium (Mg) transfers two electrons, became positive cation, to chlorine (Cl), which became negative anion.
Magnesium is metal from group 2 and chlorine is nonmetal from group 17 of the Periodic table.

Ithink this is what you meant. the temperature at which a liquid begins to boil is called the boiling point. the boiling point of water is 212°f or 100°c.  and at that point will start to turn into steam (gas)