C2a - Structure And Bonding

Question 1

What time of structure do metal atoms have?

Answer 1

Giant metallic Lattice

Question 2

What time of structure do both metal and non - metal atoms have?

Answer 2

Giant Ionic Lattice

Question 3

What time of structure do non - metal atoms have?

Answer 3

Simple Molecular

Question 4

What time of structure do Diamond, graphite/ graphene or silicon dioxide?

Answer 4

Giant Covalent Network

Question 5

What type of bonding does a GML have?

Answer 5

Strong electrostatic attractions between the metal ion and delocalised electron.

Question 6

What type of bonding does a GIL have?

Answer 6

Strong electrostatic attractions between oppositely charged ions

Question 7

What type of bonding does a SM have?

Answer 7

Strong covalent bonds hold atoms together.
Weak intermolecular forces between molecules.

Question 8

What type of bonding does a GCN have?

Answer 8

Many strong covalent bonds.
Graphite also have weak IMF.

Question 9

What physical properties does a GML have?

Answer 9

1. High Mpt and Bpt - takes a lot of energy to overcome strong electrostatic attraction
2. Conducts electricity - delocalised electrons, can move through structure and carry charge.

Question 10

What physical properties does a GIL have?

Answer 10

1. High Mpt and Bpt - takes a lot of energy to overcome strong electrostatic attractions
2. Conducts electricity only if molten or dissolved in solution because IONS must be free to move and carry charge.

Question 11

What physical properties does a SM have?
How do the weak IMF increase?

Answer 11

1. Do not conduct - no free moving electrons.
2. Low Mpt and Bpt - little energy to overcome weak IMF - these do increase if molecule RFM gets bigger.

Question 12

What physical properties does a GCN have?

Answer 12

1. All have very high melting points due to lots of energy needed to overcome strong covalent bonds.
2. Graphite/ graphene - conducts electricity due to delocalised electron
3. Graphite - slippery due to layers sliding b/c weak IMF between them.

Question 13

What happens when a metal atom and non - metal ion bond?

Answer 13

• metal atom loses outer electron to become positive metal ion ( oxidised) = full outer shell
• non - metal atom gains electron from metal atom to become negative ion ( reduced) = full outer shell

Question 14

What happens when non - metal atoms bond?

Answer 14

Non - metals SHARE pairs of electrons to be stable = COVALENT BOND