This question is about the elements in Period 3 of the Periodic Table, and some of their compounds.
The atomic radii of six of the elements are given.
Symbol | Na | Mg | Al | Si | P | S | Cl | Ar |
Atomic number |
11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
Atomic radius / nm |
0.191 | 0.160 | 0.130 | 0.102 | 0.099 | 0.095 |
Plot a graph of atomic radius against atomic number.
(2)
(1)
The melting temperatures of sodium, sodium chloride and chlorine are given in the table.
Complete the table to show the type of structure, the type of bond or force broken on melting and the particles involved.
Substance | Sodium | Sodium chloride | Chlorine |
Melting temperature / °C | 98 | 801 | −101 |
Type of structure | giant | simple molecular | |
Type of bond or force broken on melting | |||
Particles involved | chlorine molecules |
Solid phosphorus(V) chloride contains PCl4+ ions.
Draw a dot-and-cross diagram of a PCl4+ ion.
Show only outer shell electrons.
(1)
Predict the shape of a PCl4+ ion.
Justify your answer.
(3)
Shape ............................................................................................
Justification
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