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प्रश्न
Distinguish between the physical properties of metals and non-metals with reference to:
(a) lusture (b) malleability (c) ductility (d) tensile strength (e) sonority (f) conduction of heat and electricity (g) melting and boiling point (h) density.
उत्तर
| Property | Metals | Non-Metals |
| (a) Lusture | Lustrous (show brightness) | Non-lustrous Exceptions: Graphite, iodine |
| (b) malleability | Malleable Exceptions: Zinc |
Non-Malleable Exceptions: Carbon fibre |
| (c) ductility | Ductile Exceptions: Zinc, mercury |
Non-ductile Exceptions: Carbon fibre |
| (d) tensile strength | High tensile strength Exceptions: Zinc, mercury |
Low tensil strength Exceptions: Carbon fibre |
| (e) sonority | Sonorous | Not sonorous |
| (f) conduction of heat and electricity | Good conductors of heat and electricity. | Non or poor conductors of heat and electricity |
| (g) melting and boiling point | High melting point and boiling point Exceptions: Sodium, potassium, mercury |
Low melting point and boiling point |
| (h) density |
High density Exceptions: |
Low density Exceptions: Graphite [carbon] |
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