Name two non-metals which are used in fireworks (crackers,etc.).
Hence, sulphur and phosphorus are the two non-metals used in fireworks.
Name two non-metals which are both brittle and non-ductile.
(a) Name the three classes in which elements are classified. Which was the first metal used by man?
(b) Name the metal and non-metal present in abundance in the earth crust.
Name two metals which are used to make jewellery.