An Atom That Has 54 Protons, 54 Electrons, and 78 ${ } _ { 54 } ^ { 132 } \mathrm { Xe }$

An atom that has 54 protons, 54 electrons, and 78 neutrons is _____.

A) ${ } _ { 54 } ^ { 132 } \mathrm { Xe }$
B) ${ } _ { 55 } ^ { 132 } \mathrm { Cs }$
C) ${ } _ { 54 } ^ { 78 } \mathrm { Xe }$
D) ${ } _ { 78 } ^ { 54 } \mathrm { Pt }$
E) ${ } _ { 78 } ^ { 108 } \mathrm { Pt }$