Question

45. Consider the following materials: copper, sulfur, phosphorous, carbon (such as pencil lead), gold, silver. Which of these materials are: (a) malleable and ductile, and (b) brittle?

Answer 1

Malleable and ductile	Brittle
Copper, Gold and Silver	Sulphur, Phosphorous, Carbon

Copper, Gold, and Silver are malleable and ductile because they are considered metals. They can be beaten into sheets or drawn into wires.
Sulphur, Phosphorous, and Carbon are brittle because they are non-metals. They can't be rolled into wires or flattened into sheets.