Question

Why do you think CI is larger than a neutral CI atom?

Answer 1

$\huge\underline\bold\pink{A} \underline\bold\red{N}\underline\bold\blue{S}\underline\bold\green{W}\underline\bold\orange{E}\underline\bold\pink{R}$

Because the nucleus can't hold the 18 electrons in the Cl- ion as tightly as the 17 electrons in the neutral atom, the negative ion is significantly larger than the atom from which it forms.