The Neutral Deuterium Atom ${ } _ { 1 } ^ { 2 } \mathrm { H }$

Multiple Choice

The neutral deuterium atom, ${ } _ { 1 } ^ { 2 } \mathrm { H }$ , has a mass of $2.014102 \mathrm { u }$ ; a neutral ordinary hydrogen atom has a mass of $1.007825 \mathrm { u }$ ; a neutron has a mass of $1.008665 \mathrm { u }$ ; and a proton has a mass of $1.007277 \mathrm { u }$ . What is the binding energy of the deuterium nucleus? $\left( 1 \mathrm { u } = 931.5 \mathrm { MeV } / \mathrm { c } ^ { 2 } \right)$

A) $2.9 \mathrm { MeV }$
B) $3.4 \mathrm { MeV }$
C) $1.7 \mathrm { MeV }$
D) $1.1 \mathrm { MeV }$
E) $2.2 \mathrm { MeV }$