Nickel belongs to the transition metals and is hard and ductile and is used in many specific industrial and consumer products such as stainless steel, special alloys, alnico magnets and rechargeable batteries.
Copper is a ductile metal with very high thermal and electrical conductivity and is used as a conductor of heat and electricity, a building material, and a constituent of various metal alloys.
The six platinum-group metals are ruthenium, rhodium, palladium, osmium, iridium, and platinum. They have similar physical and chemical properties and tend to occur together in the same mineral deposits.
Lithium is a chemical element with the symbol Li and atomic number 3. It is a soft, silvery-white alkali metal. Under standard conditions, it is the lightest metal and the lightest solid element. Like all alkali metals, lithium is highly reactive and flammable, and is stored in mineral oil.
Tantalum is a chemical element with symbol Ta and atomic number 73. Previously known as tantalium, its name comes from Tantalus, a villain from Greek mythology. Tantalum is a rare, hard, blue-gray, lustroustransition metal that is highly corrosion-resistant.