Problem: A sample of copper is found to have a close packing arrangement with an A-B-C-A-B-C pattern between layers. Which of the following would be the coordination number for the copper atoms in this sample?(a) 4(b) 6(c) 8 (d) 10 (e) 12

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We are asked for the coordination number for the copper atoms in close packing arrangement


The coordination number is the number of other atoms that an atom touches. 

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Problem Details

A sample of copper is found to have a close packing arrangement with an A-B-C-A-B-C pattern between layers. Which of the following would be the coordination number for the copper atoms in this sample?

(a) 4

(b) 6

(c) 8 

(d) 10 

(e) 12