Question

In a reaction, chlorine accepts an electron to form Cl-. What is true about the atomic size of the chlorine ion?

Answer 1

When a neutral atom that has a charge of negative absorbs an electron, this tends to lessen the size of the ion. The larger the negative charge of the negatively charged element, the smaller the size of the ion will be. Hence the answer is that the ion will have a smaller size than the neutral atom

Answer 2

Answer is: The atomic size of the chlorine ion is larger than the size of the chlorine atom.

Covalent radii of chlorine atom (Cl) is 0.099 nm and ionic radii of chlorine anion (Cl⁻) is 0.181 nm.

Difference between an chlorine atom and chlorine anion is the number of electrons that surround the nucleus.

Chlorine atom has 17 electrons and chlorine anion has 18 electrons.