TERM 2 LESSON 3 - ionic bonding (ion bonds + properties of ionic compounds)

bonding

process of connecting two elements

4 types of bonding

ionic, covalent, dative covalent, metallic

ionic bonding...

is the electrostatic force of attraction between/with two oppositely charged ions (cation and anion)

ionic bond is between...

metals and non metals

number of electrons lost =

number of electrons gained

NaCl (draw it)

Na+Cl-

MgCl2 (draw it)

Mg2+Cl2- 2

CaO (draw it)

Ca2+O2-

AlCl3

Al3+Cl3-

properties of ionic compounds

form crystal lattices, conduct electricity in solution, and have high melting and boiling points.

lattice energy

the energy released when one mole of an ionic crystalline compound is formed from gaseous ions

if hydrogen energy is more than lattice energy then...

the ionic crystalline compound is soluble in water

if hydrogen energy is less than lattice energy then...

the ionic crystalline compound is not soluble in water

higher the charge on the ions...

stronger the attraction

stronger the attraction...

stronger the ionic bond

stronger the ionic bond...

higher the melting/boiling point