This question is about bonding, structures and properties.
The box gives four types of structure:
[ giant covalent | giant ionic | giant metallic | simple molecular ]
The table shows some properties of four substances, W, X, Y and Z. Complete the table by giving the correct type of structure for each substance. You may use each structure once, more than once or not at all.
| Substance | Electrical conductivity of solid | Electrical conductivity of liquid | Melting point | Type of structure |
|---|---|---|---|---|
| W | poor | poor | low | |
| X | poor | poor | high | |
| Y | good | good | high | |
| Z | poor | good | high |
Sodium oxide (Na2O\text{Na}_2\text{O}Na2O) is an ionic compound. Sodium has an electronic configuration of 2,8,1 and oxygen has an electronic configuration of 2,6. Describe how sodium atoms and oxygen atoms form sodium ions and oxide ions.
Describe the electronic configuration and charge of each of the ions in sodium oxide.
A molecule of carbon disulfide (CS2\text{CS}_2CS2) contains double covalent bonds. Describe the arrangement of the outer shell electrons in a molecule of carbon disulfide.
Gallium (Ga\text{Ga}Ga) is a metal in Group 3 of the Periodic Table. Describe the structure and bonding in gallium.
Explain why gallium is malleable.
