(a) Name two physical properties each of sodium and carbon in which their behaviour is not as expected from their classification as metal and non- metal respectively.
(b) Name two metals whose melting points are so low that they melt when held in the hand.
(a) Name two physical properties each of sodium and carbon in which their behaviour is not as expected from their classification as metal and non- metal respectively.
(b) Name two metals whose melting points are so low that they melt when held in the hand.
(a) Metals are generally strong. But sodium is not a strong metal and it cannot support heavy objects without breaking.
Metals are generally hard. But sodium is a soft metal and can be cut even with a knife.
Non-metals are generally soft. But carbon in the form of diamond is extremely hard.
Non-metals are generally non-lustrous. But carbon in the form of diamond is a lustrous (shiny) substance.
(b) Galium and caesium are the two metals whose melting points are so low that they melt when held in hand.
(a) Metals are generally strong. But sodium is not a strong metal and it cannot support heavy objects without breaking.
Metals are generally hard. But sodium is a soft metal and can be cut even with a knife.
Non-metals are generally soft. But carbon in the form of diamond is extremely hard.
Non-metals are generally non-lustrous. But carbon in the form of diamond is a lustrous (shiny) substance.
(b) Galium and caesium are the two metals whose melting points are so low that they melt when held in hand.
