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Complete Chemical Symbol of an Ion

CHEM-MP7RYP

Which of the following is the complete chemical symbol of an ion with 18 electrons, 20 neutrons and 17 protons?

A

$_{ 17 }^{ 37 }{ Cl }^{3+}$

B

$_{ 17 }^{ 37 }{ Cl }^{-}$

C

$_{ 17 }^{ 37 }{ Cl }^{+}$

D

$_{ 17 }^{ 35 }{ Cl }^{-}$