This book discusses the chemical element tellurium's (Te) properties, uses and research. Chapter One summarizes the synthesis, properties and applications of tellurium nanostructures. Chapter Two studies the advances in the preparation and characterization of Te, N-containing heterocycles. Chapter Three discusses the current status of knowledge concerning toxicology and pharmacology of organotellurium compounds from different classes. Chapter Four focuses on electrochemical deposition of tellurium on n- and p-Si wafers, in porous SiO2 layer on n-Si and in the barrierless template of nanoporous alumina.