2.4 Ionic Bonds and Compounds

Front

What are cations and anions?

Back

Cations are positive ions, and anions are negative ions.

Front

What is an ionic bond?

Back

A strong electrostatic attraction between oppositely charged ions.

Front

How are ionic bonds formed between Group I and Group VII elements?

Back

Ionic bonds are formed through the transfer of electrons, Group I metal lose electron(s), group VII non metal accept electron(s).

Front

What are the properties of ionic compounds?

Back

(a) High melting points and boiling points. (b) Good electrical conductivity when aqueous or molten due to mobile ions, and poor when solid because ions are not mobile.

Front

What is the giant lattice structure of ionic compounds?

Back

A regular arrangement, of alternating positive and negative ions.

Front

Explain the high melting points and boiling points of ionic compounds.

Back

Due to strong electrostatic forces between oppositely charged ions.

Alot of heat energy is required to overcome the strong forces.

Front

Explain why ionic compounds are good electrical conductor when aqueous or molten, and are poor electrical conductor when solid.

Back

Good conductivity when aqueous or molten due to free-moving ions; poor when solid due to fixed positions of ions.