# If the mass defect of , $B^{11}$ is $0.081\;amu,$ its average binding energy (in Mev) is

$\begin {array} {1 1} (1)\;8.60 & \quad (2)\;6.85 \\ (3)\;5.60 & \quad (4)\;5.86 \end {array}$

(2) 6.85
answered Nov 7, 2013 by