Question

Table 5.1 gives some information about the Group VII elements.

(a) (i) Complete Table 5.1 to show the colour of bromine. 
      (ii) Complete Table 5.1 to show the state of chlorine at room temperature. 
      (iii) Complete Table 5.1 to predict the melting point of fluorine. 
              Use ideas about trends down a group to help you.

(b) Fig. 5.1 shows a diagram of a sodium atom.

  (i) Sodium is in Period 3 of the Periodic Table.
      Use Fig. 5.1 to explain why sodium is in Period 3.

  (ii) A sodium atom is neutral.
        Explain why.
        Use ideas about the particles in an atom.

(c) Chlorine reacts with sodium to form the compound sodium chloride.
       Sodium has the electronic structure 2.8.1.
       Chlorine has the electronic structure 2.8.7.
       Draw a dot-and-cross diagram to show the ions in sodium chloride. Show outer-shell electrons only.
       Include the charges on the ions.

(d) Solid sodium chloride has a lattice structure.
      Put a tick (✓) next to the statement that describes this lattice structure.
      giant structure of atoms with strong bonds between the atoms 
      irregular arrangement of random positive and negative ions       
      regular arrangement of alternating positive and negative ions   
      simple molecules with weak forces between the molecules