particle density Directory References Discover 9 of the World’s Deadliest Snakes What Is the Emoluments Clause? Ten Days That Vanished: The Switch to the Gregorian Calendar 7 of History's Most Notorious Serial Killers 6 Animals We Ate Into Extinction Who Invented the Internet? Why Do Some Cicadas Appear Only Every 17 Years? Contents particle density physics Ask the Chatbot a Question Ask the Chatbot a Question Learn about this topic in these articles:definition In densityThe expression particle density refers to the number of particles per unit volume, not to the density of a single particle, and it is usually expressed as n.Read More