Question: what are physical and chemical properties of sodium?
Answer: It is soft enough to be cut with a knife. 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).