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प्रश्न
Distinguish between:
Metals - Nonmetals (physical characteristics)
उत्तर
| Metals | Nonmetals | |
| 1. | Metals are generally solids at room temperature. Exception: Mercury is liquid at room temperature. |
Nonmetals are generally gases or solids at room temperature. Exception: Bromine is in liquid state at room temperature. |
| 2. | Metals are hard. Exceptions: Sodium, potassium. |
Nonmetals are generally soft. Exception: Diamond |
| 3. | Metals have high melting and boiling points. Exceptions: Sodium, potassium, mercury, gallium. |
Nonmetals have low melting and boiling points. |
| 4. | Metals have lustre. | Nonmetals have no lustre. Exception: Iodine |
| 5. | Metals are good conductors of heat and electricity. | Nonmetals are bad conductors of heat and electricity. Exception: Graphite is good conductor of electricity. |
| 6. | Most of the metals are sonorous i.e., they produce a sound when stuck on hard surface. | Nonmetals are not sonorous. |
| 7. | Metals are malleable and ductile. | Nonmetals are not malleable and ductile. |
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