The book "Inorganic Chemistry" is addressed to those younger naturalists for whom chemistry has already become a favorite subject at school. In other words, our alleged young reader is someone who has already made a choice of his future specialty. It will be chemistry! We hope that the Encyclopedia will benefit educators. We want her to become a faithful companion of all who are captivated by ancient and eternally young science - chemistry that penetrates the secrets of nature and serves the good of human society.