1.5 Which one of the following formulae represents a diatomic molecule? (1)

6.4 Which point on the graph indicates the condensation point of gas? Select only the appropriate letter. (1)

  The following table shows the densities of a few different substances. Study the table and answer the questions that follow.  Right-click on the blue button below to open the table in a new tab.    

7.1 Which of the solids in the table will sink in mercury? (1)

6.7 Which phase change occurs at point B?  (2)   It changes from [1] to [2]  

6.5 What do we call the process taking place at point E?  (1)

2.3 During a chemical reaction, the reactants are used to make the products (1)

6.2 Which point on the graph indicates the freezing point of water? Select only the appropriate letter. (1)

2.5 Particles moving from a lower concentration to a higher concentration is called diffusion  (1)

1.8 When energy is added and the particles at the surface of a liquid change state to a gas (1)