Addition of arsenic in small amount to pure germanium will result in the formation of — Solid State Chemistry Question

💡 Solution & Explanation

Germanium is a Group 14 element. Arsenic is a Group 15 element with five valence electrons. When doped into germanium, four electrons form covalent bonds, and the fifth electron remains free and delocalized, increasing conductivity. This excess of negative charge carriers creates an n-type semiconductor. Therefore, correct answer is A.