Bi

1. Introduce – Bismuth, a post-transition metal belonging to Group 15 of the periodic table, is gaining attention as an eco-friendly material that shares physical properties similar to lead (Pb) yet is virtually non-toxic. – This element, which is relatively rare in nature, is distinguished by its “diamagnetism,” “low thermal conductivity,” and—a trait extremely rare among metals—its “expansion during solidification.” – Based on these unique properties, bismuth holds significant strategic value as an eco-friendly alloy additive to replace lead. It is widely used across a broa...