What is the minimum cation-to-anion radius ratio (rC/rA) for an octahedral interstitial lattice site?

Ionic compounds are made of ions, and yet the overall charge of an ionic compound is neutral. why?

Matches the chemical name of each oxide of phosphorus to its chemical formula

How does the digestive system interact with the circulatory system? a. messages sent as electrical impulses from the digestive system are transported throughout the body by the circulatory system. b. nutrients taken in and broken down by the digestive system are carried to various parts of the body by the circulatory system. c. nutrients and gases are absorbed by organs in the circulatory system. then, they are transported to all parts of the body by organs in the digestive system. d. oxygen and carbon dioxide are exchanged by organs in the digestive system, and the gases are carried to the rest of the body by the circulatory system.