Question

Which one between Cl and Cl
–
would have larger size. Why

Answer 1

Answer:

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.

Answer 2

Answer:

Uncharged Cl is smaller than Cl-ion. In general, when an element becomes charged the anion will get the bigger and the cation will get smalled compared to the uncharged element.