Question

compare metals and non metals in terms of their lusture

Answer 1

metals are lustures and non metal are non lustures.

Answer 2

Luster: Silicon for example appears lustrous, but is not malleable or ductile (it is brittle - a characteristic of some nonmetals). It is a much poorer conductor of heat and electricity than the metals. Solid Solutions: They can form alloys with other metals.A lustrous non-metal is a non-metal that has a shiny appearance i.e. carbon as graphite, phosphorus as black phosphorus, selenium, and iodine. If you count metalloids as non-metals you can add boron, silicon, germanium, arsenic, antimony, and tellurium.

Metals are lustrous because of the free electrons they have. The free electrons can move freely in the metal causing any light incident on them to get reflected back. This reflection is specular reflection rather than diffused and thus the metal surface appears shiny or lustrous .

hope it clarifies ur doubt dear friend...