how old was james chadwick when he died?
<answer> James Chadwick was 82 years old when he died. <context> In 1945, the British Government knighted him for his wartime contribution, and he became Sir James Chadwick. The U.S. Government awarded him the Medal of Merit in 1946, The End. James Chadwick died peacefully, at the age of 82, on July 24, 1974.