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Ionic bonding

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Question 2

Sodium and chlorine both form chlorides.

a.

Sodium reacts with chlorine to produce the ionic compound sodium chloride. The diagrams show the arrangement of electrons in a sodium atom and in a chlorine atom: Diagram of a sodium atom with three shell rings containing 2, 8, and 1 electrons represented by dots respectively, with nuclear core labeled Na; and a chlorine atom with three shell rings containing 2, 8, and 7 electrons represented by crosses respectively, with nuclear core labeled Cl. Draw similar diagrams to show the arrangement of the electrons in the ions formed when sodium reacts with chlorine. Show all the electrons in each ion.

[2]
b.

Silicon tetrachloride is a simple molecular compound. The displayed formula for a molecule of silicon tetrachloride is: Displayed formula of a silicon tetrachloride molecule, consisting of a central Si atom bonded to four surrounding Cl atoms (top, bottom, left, right) by single lines representing covalent bonds. Draw a dot and cross diagram to show the arrangement of the electrons in this molecule. Show only the outer electrons.

[2]
c.

The table shows some properties of sodium chloride and silicon tetrachloride. | Compound | Melting point | Ability to conduct electricity when molten or liquid | | :--- | :--- | :--- | | sodium chloride | high | good | | silicon tetrachloride | low | poor |

Explain these properties of each compound.

[4]

Ionic bonding Questions

  1. IGCSE
  2. /Chemistry
  3. /Ionic bonding