ionic lattices and compounds

Ionic compound

Giant structure of ions

Ionic compound structure

Regular repeating pattern alternating between positive and negative ions

An ionic lattices is held together by

Strong electrostatic forces of attraction between oppositely charged ions which act in all directions in the lattice

Pros vs cons of two densional space Filling representation

Pro , shows arrangements of ions in one layer. Con, only shows that layer.

Pros and cons of ball and stick models

Pro, shows arrangement in large section of the crystal. Con, using sticks got bonds is misleading because bonds work in all directions.

Pros and cons of three dimensional model

Pro, shows multiple layers. Con, shows free space between ions, which there isn’t.

Ionic compounds melting and boiling points are

High, so they are solid at room temp

For an ionic compound to boil and evaporate,

Energy must be transferred to overcome the strong electrostaticforces attracting the ions

The stronger the bonds

The higher the melting+ boiling points, and the more energy needed to overcome those bonds

Covalent substances have low melting and boiling points due to

Weak intermolecular forces, not weak covalent bonds.

Because ionic lattices have a lot of bonds

They require more energy to melt and boil

Ions with higher charge will have

Stronger bonds

A substance can conduct electricity if

It contains charges particles that are free to move

Ions cannot conduct in solid form bcause

The charged ions are fixed in place

Ions can conduct in liquid or gas forms because

The charged ions are free to move.