Discussion
Match the following materials with their corresponding bonding types.
| Material | Bonding |
|---|---|
| P: Cu0.5Al0.5 | 1: Ionic |
| Q: ZnS | 2: Covalent |
| R: Na2O | 3: Metallic |
| S: Li4SiO4 | 4: Mixed |
Answer: C
The match is P - 3; Q - 2; R - 1; S - 4.
- Cu0.5Al0.5 is an alloy of two metals: metallic bonding.
- ZnS (zinc blende) has tetrahedral, largely covalent bonds.
- Na2O, an alkali-metal oxide, is ionic.
- Li4SiO4 has covalent Si-O bonds within the silicate tetrahedra and ionic bonding between Li+ and those groups: mixed.
Each of the other options gives the alloy or the oxide the wrong bond type, for example calling Na2O metallic or ZnS ionic.
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