Radioactivity and Radioactive Substances: An Introduction to the Study of Radioactive Substances and Their Radiations is a book written by James Chadwick in 1921. The book provides an overview of the principles of radioactivity and the nature of radioactive substances and their radiations. The author begins by discussing the discovery of radioactivity and the properties of radioactive elements, including their decay and half-life. The book then delves into the types of radiation emitted by radioactive substances, such as alpha, beta, and gamma radiation, and their properties. Additionally, the author discusses the effects of radiation on living organisms and the various applications of radioactivity in medicine, industry, and research. The book is written in a clear and accessible style, making it suitable for students and professionals in the field of nuclear physics and related disciplines. Overall, Radioactivity and Radioactive Substances is a valuable resource for anyone interested in understanding the fundamental principles of radioactivity and its applications.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.