Regrettably, no information can be found about the substance “Hg2Si2”. This could be an incorrect chemical formula expression, or this substance does not exist naturally and has not been synthesized in the laboratory.
The elemental constituents in this formula include Hg (Mercury) and Si (Silicon). Mercury is a metallic liquid at room temperature and has many technological applications. Meanwhile, Silicon is a common element in the Earth’s crust and is a main component of sand.
In cases where you encounter difficulties in searching for information about a specific chemical substance, make sure you have spelled it correctly and accurately written its formula. If you are uncertain about this, refer to a reliable source such as the periodic table of elements, textbooks, or ask your teacher.