gold
Lead
Iron
most often it is silicon, the semiconductor
Several different metals can be used in magnets. Iron is perhaps the most common metal used in permanent magnets, but alloys such as Alnico (Aluminum, Nickel, and Cobalt) can also make very strong permanent magnets.
Magnets have long been claimed to have biological effects though no careful objective clinical trials have ever demonstrated this. Nonetheless, there is a thriving business associated with "healing magnets." The magnets sold as healing magnets are made from the same materials as all other magnets are made from. Examples of the magnets and their use include the following. a) FLEXIBLE MAGNETIC RUBBER Flexible magnetic rubber magnets are commonly formed in sheets or strips and used for magnetic therapy in shoe insoles.. b) CERAMIC MAGNETS Ceramic magnets are most commonly used in body wraps, pads and cushions. c) NEODYMIUM MAGNETS Most commonly used in magnetic jewelry, bracelets, and individually on pain trigger or acupuncture points. d) SAMARIUM COBALT MAGNETS Most commonly used magnets in high quality jewelry where rusting is to be avoided. A very expensive magnet, very brittle, therefore labor intensive. e) HEMATITE MAGNETS Beaded magnetic hematite is very commonly used as bead magnets in high quality jewelry where bead strands are used to create beaded hematite bracelets, beaded hematite necklaces, or beaded hematite belts. With hematite the jewelry is the magnet rather than a magnetic insert into the jewelry.
Lead
Gluetonium
Nickel is used more in magnets
Neither really. Iron, since it is naturally magnetic, is often used in most magnets. Gold is conductive, so it can be used in electro-magnets, but it's cheaper to use Iron-ferrite
the element is cobalt
Neither is magnetic, so neither are used in magnets.
Iron
Magnesium Mg
Most often it is tungsten.
It is often used for making magnets. Cobalt oxide is often used for blue dyes and stained glass.
I'm not sure that "most used element" is a thing. Most used in what?Hydrogen is the most common element in the universe, but I have no idea what you mean by "most used."
Magnets are found in the speakers of TVs, Hi Fi systems and computers. Magnets are also often used as closure devices on bathroom cupboards & fridges.