A group of metals with high resistance to oxidation and chemical dissolution, including mercury, gold, rhenium and platinum group elements
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Category: <span>N</span>
A group of inert gases which includes neon, helium, argon, krypton, xenon, and radon
A soft, white and ductile metallic. Symbol, Nb
An isometric base metal. Symbol, Ni
An electrically neutral elementary particle, nearly equal in mass to a proton