For copper, the ratio between interstitial formation enthalpy and the energy required to create a vacancy is _____________

For copper, the ratio between interstitial formation enthalpy and the

1.	For copper, the ratio between interstitial formation enthalpy and the energy required to create a vacancy is _____________
A.	3:1
B.	2:1
C.	1:1
D.	1:2
Answer» B. 2:1