ionic bonding

Question 1

define ionic bonding

Answer 1

electrostatic attraction between positive and negative ions

Question 2

what does ionic bonding occur between?

Answer 2

metal and a non-metal
electrons are transferred from the metal to the non-metal

Question 3

how is a giant-ionic lattice formed?

Answer 3

oppositely charged ions attract each other through electrostatic forces

Question 4

describe the melting and boiling point of substances with an ionic crystal structure and why?

Answer 4

have a high melting and boiling point
- because the electrostatic forces holding the ionic lattice together are strong and require a lot of energy to overcome

Question 5

when can ionic substances conduct electricity and why?

Answer 5

when molten or aqueous
- the ions are seperate and are no longer held in a lattice, therefore free to move and can carry a flow of charge

Question 6

why can’t ionic substances conduct electricity when in the solid state?

Answer 6

ions are in fixed positions with no mobile charge carriers

Question 7

why are ionic substances often brittle materials?

Answer 7

when the layers of alternating charges are distorted, like charges repel.
-breaking apart the lattice into fragments

Question 8

explain why ionic compounds dissolve in water

Answer 8

• polar water molecules are towards ions on the surface of the ionic lattice
• water molecules bond to the ions, weaken ionic bonds
• ionic bonds break
• ions are surrounded by water molecules and break free from the lattice