Why does N(3-) have a larger ionic radius than that of O(2-)??

Question

Why does N(3-) have a larger ionic radius than that of O(2-)??

THANK YOU!

Answer 1

The ionic radius is not a fixed property of a given ion, but varies with coordination number, spin state and other parameters. Nevertheless, ionic radius values are sufficiently transferable to allow periodic trends to be recognized. As with other types of atomic radius, ionic radii increase on descending a group. Ionic size (for the same ion) also increases with increasing coordination number, and an ion in a high-spin state will be larger than the same ion in a low-spin state. Anions (negatively charged) are almost invariable larger than cations (positively charged), although the fluorides of some alkali metals are rare exceptions.

In general, ionic radius decreases with increasing positive charge and increases with increasing negative charge.

N3- is bigger negative than o2- so thats the reason

Answer 2

in general, an ion with 3 electrons has bigger radius than a 2 electrons ion.
However this general rule is not always true, because of many other factors, like spin and coordination.

Answer 3

"In general, ionic radius decreases with increasing positive charge and increases with increasing negative charge."

"Dad" above is right.

Answer 4

Same number of protons, but one more electron. More repulsion - greater radius.