d031b852_ध_रस_यन___क__स_च____व_क_प_ड_य___Source_and_description
[Chemical name] nickel [Chemical formula] Ni [Common or alternative name] ----- [Source and description] 
Pre-1985 Canadian nickels are made of nickel. Note: American "nickels" are composed of 25% nickel and 75% copper. Nickel is often used as a welding filler material, and 1/16-1/8" Ni wire is often available at welding supply stores.
सरलता से उपलब्ध रसायनों की सूची - विकिपीडिया