'धातु' (metals) और 'अधातु' (non-metals) में मुख्य अंतर:

उत्तर: (C) Metals are lustrous, malleable, conductors; non-metals are dull, brittle, insulators — Metals: lustrous, malleable, ductile, good conductors (heat+electricity), sonorous, solid (except mercury). Non-metals: dull, brittle, poor conductors (except graphite), gases/solids. Metalloids: prop...