F321-Ionic Bonding

Question 0

Define ionic bond

Answer 0

The electrostatic attraction between oppositely charged ions

Question 1

What forms ionic bonds?

Answer 1

Metals and non-metals

Question 2

When drawing ionic bonds, what should you do?

Answer 2

Show the outer electrons only, put brackets around the element, include the charge and any additional big numbers

Question 3

Explain why the strength of ionic bonds in MgO is much higher than that if those in NaCl.

Answer 3

• Mg2+ has a higher ionic charge than Na+
• O2- has a higher ionic charge than Cl-
• there is a greater electrostatic attraction between Mg2+ and Cl-

Question 4

Describe the bonding and structure in ionic substances

Answer 4

They have ionic bonding-the electrostatic attraction between oppositely charged ions
They have a GIANT structure-held together by strong ionic bonds

Question 5

Describe the melting points in ionic substances

Answer 5

They have high melting points because a lot of energy is required to overcome the strong ionic bonds

Question 6

Describe the electrical conductivity in solid ionic substances

Answer 6

They cannot conduct electricity. This is because the ions are fixed in a lattice and cannot move and carry charge.

Question 7

Describe the electoral conductivity in molten/aqueous ionic substances.

Answer 7

They can conduct electricity. The lattice breaks down and the ions are free to move an carry charge.

Question 8

Describe the solubility of ionic substances

Answer 8

They are very soluble.

Ions are attracted to polar water molecules which breaks apart the lattice