The drawing shows sodium and chloride ions positioned at the corners of a cube that is part of the crystal structure of sodium chloride (common table salt). The edges of the cube are each 0.281 nm (1 nm = 1 nanometer = 10-9 m) in length. What is the value of the angle u in the drawing?

Transcribed Image Text:

Sodium ion Chloride ion 0.281 nanometers