Question

which metals are called Noble metals why

Answer 1

In chemistry, the noble metals are metals that are resistant to corrosion and oxidation in moist air (unlike most base metals). The short list of chemically noble metals (those elements upon which almost all chemists agree) comprises ruthenium, rhodium, palladium, silver, osmium, iridium, platinum, and gold

Answer 2

Hey here is your answer,

Metals like Gold(Aurum), Silver, Platinum, Rhodium etc are called noble metals.
These metals are called so because when looking at the reactivity series of metals, these metals are placed at last of the series which shows that they show negligible reaction to other elements.They are also oxidize less readily than other metals.They are resistant to corrosion or oxidation.

hope it helps u