Tantalum nanoparticles are high surface area spherical metal particles as big as 10 to 20 nm. They are considerably corrosion-resistant agents and are excellent conductors of electricity and heat. Tantalum nanoparticles are classified among the five main refractory metals as highly resistant to heat and wear. They have wide applications as in improving the quality of capacitors and even reduce the size of them. As the package size of capacitors decreases, the parts with higher capacity can be added to the existing circuits and achieve smaller circuits too. They are applied as dopants in photoelectrode materials as well as applications in semiconducting materials. Tantalum nanoparticles have magnetic and optical properties with uses in micro-batteries. In addition, there are ongoing research and studies on their electrical and dielectrical applications as well. Tantalum nanoparticles can be synthesized using hydrogen arc plasma method at the operation voltage, electric current of 25V and 350A, respectively with the total pressure of hydrogen and fixed at 5 Pa.