Give two physical properties each of sodium and carbon in which their behavior is not expected from their classification as metal and non metals
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The surface is bright and shiny when first cut, but quickly becomes dull as sodium reacts with oxygen in the air. A thin film of sodium oxide (Na 2 O) forms that hides the metal itself. Sodium's melting point is 97.82°C (208.1°F) and its boiling point is 881.4°C (1,618°F).
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Na is a brittle metal and can be cut with a knife whereas most metals are hard.
Also Na can dissolve in water and form hydroxide
Ca in the form of diamond is a very hard substance.
Ca in the form of graphite can conduct electricity.
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