Which of the Following Is the Correct Atomic Symbol for an Element

Which of the following is the correct atomic symbol for an element with 17 protons and 18 neutrons?

A) ${ } _ { 17 } ^ { 35 } \mathrm { Ar }$
B) ${ } _ { 17 } ^ { 18 } \mathrm { Ar }$
C) ${ } _ { 17 } ^ { 35 } \mathrm { Cl }$
D) ${ } _ { 18 } ^ { 17 } \mathrm { Ar }$
E) ${ } _ { 17 } ^ { 18 } \mathrm { Cl }$