Unfortunately, the compound As2H4Se2 does not exist in textbooks and published information sources. As, H, Se are the chemical symbols of Arsenic, Hydrogen, and Selenium. However, these elements do not combine in a ratio of 2:4:2 to form the compound As2H4Se2.
To understand the physical properties, chemical properties, and methods of synthesis of the compounds of Arsenic, Hydrogen, and Selenium, students need to study each element and their compounds.
Arsenic (As) is a chemical element belonging to group 15 of the periodic table, with atomic number 33. It typically appears in the form of As2O3 in nature.
Hydrogen (H) is the simplest chemical element, with an atomic number of 1. It is the main component of water and most organic compounds.
Selenium (Se) is a chemical element that belongs to group 16 of the periodic table, with atomic number 34. One of the common compounds of Selenium is SeO2.
The synthesis method of the compounds of these elements depends on their chemical properties and should be performed under the guidance of a teacher or a chemistry expert.