The statement which correctly compares the relative size of an ion to its neutral atom is: A. The radius of an anion is greater than the radius of its neutral atom.
Atomic radii can be defined as a measure of the size (distance) of the atom of a chemical element such as chlorine, sodium, hydrogen, carbon, oxygen, nitrogen, etc., typically from the nucleus to the valence electrons.
An ion can be defined as an atom or molecules (group of atoms) that has lost or gained one or more of its valence electrons, thereby, making it have a net positive or negative electrical charge.
Basically, there are two (2) types of ion and these are:
Generally, an anion is a positive electrical charge that is formed when the atom of a chemical element gains an electron.
The atomic size of a chemical element increases as its number of electrons increase, thereby, increasing its atomic size and radius.
Consequently, the radius of an anion in comparison with the radius of its neutral atom becomes greater because it gains more electron from other atoms.
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