name of material which is smooth hard and lustrous
Answers
iron,copper, gold
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Answer:
Smooth and lustrous materials include diamond, silver, gold, iron, and aluminium.
Explanation:
Transition metals are hard and glossy solids with high melting points that create vividly coloured compounds.
Metals contain a lot of free electrons, which cause a massive electron pressure (on the order of 100,000 atm), therefore crushing them requires pressures greater than their internal electron gas pressure; this is why metals are hard.
A metal is a lattice of metal "ions" amid a "sea" of delocalised electrons - mobile electrons. Light photons do not penetrate very deep into the surface of a metal and are often reflected, or bounced off, the metallic surface by mobile electrons, resulting in metallic reflection, that becomes lustrous.