Ionic, Covalent and Metallic Bonding (3)

Question 1

Explain how a covalent bond holds two atoms together

Answer 1

Electrostatic force of attraction between shared pair of negatively charged electrons and both positively charged nuclei

Question 2

Explain why there would be an environmental problem if sulphur dioxide escaped into the atmosphere

Answer 2

Causes acid rain which kills fish

Question 3

How does the half equation show that copper atoms are oxidised?

Answer 3

Electrons are lost

Question 4

Write a balanced half equation for the reaction at the negative electrode

Answer 4

C2+ + 2e- = Cu

Question 5

Describe the bonding in a metal, and explain why metals conduct electricity

Answer 5

Lattice of positive ions where there is an electrostatic attraction between the positive ions and the electrons. Contains delocalised electrons which can move through the metal

Question 6

Describe how copper compounds are extracted by phytomining

Answer 6

Copper compounds are absorbed by plants which are burned. The ash contains the copper compounds.

Question 7

How does the energy level show that the reaction is exothermic?

Answer 7

Products are at a lower energy level than the reactants