Ionic Compounds

Question 1

Describe the first process of a ‘Dot + Cross’ diagram of Sodium Chloride + Sodium Oxide

Answer 1

• The sodium atom gives up its outer electron, becoming an Na+ ion
• The chlorine atom then picks up the electron, becoming a Cl- ion in the process

Question 2

What then happens to the sodium atom? (2)

Answer 2

• It gives up its outer electrons, to become two Na+ ions

- The Oxygen atom then picks up two electrons, to become an O2- ion

Question 3

What do all atoms end up with?

Answer 3

• Full outer shell as a result of this giving and taking of electrons

Question 4

What do Ionic Bonds always produce?

Answer 4

• Compounds with similar structures

Question 5

What do Ions then form?

Answer 5

• A closely packed regular lattice arrangement

Question 6

What do Ionic Bonds have?

Answer 6

• As they are very strong, electrostatic forces of attraction are created between oppositely charged ions

Question 7

Give examples of Ionic Compounds and explain how they are related

Answer 7

• Sodium Chloride and Magnesium Oxide

- They all have similar properties caused by their structure

Question 8

Why is very high MP + BP a property of Ionic Compounds?

Answer 8

• Due to very strong bonds between the ions, which it takes a lot of energy to break

Question 9

Finally, why is conducting electricity a property?

Answer 9

• As when in Aqueous solution (dissolved), the ions seperate and are all free to move, so they will carry an electrical current