What does ionic radii mean?

Answer 1

Radius of an ion

The difference in radius between an atom in its neutral state (atomic radius) and an ionic state (ionic radius) depends on the charge of the ion.

Because of the number of protons and electrons in the ion, the radius grows with increasing negative charge and decreases with increasing positive charge.

With cations, there are more protons than electrons. This will cause the electrons to be held more tightly to the nucleus. When the first two columns become ions, you essentially lose the outermost subshell. The ionic radius decreases significantly compared to the atomic radius. In #NaCl#, sodium is #Na^+A#. since sodium loses an electron, there are 10 electrons being held by 11 protons.
With anions, there are more electrons than protons. This will cause the electrons to be held less tightly to the nucleus. The ionic radius increases (sometimes significantly) compared to the atomic radius. In #NaCl#, chlorine has a -1 charge. When chlorine gains an electron, there are 18 electrons being held by 17 protons.
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Answer 2

Ionic radii refer to the measure of the size of an ion in a crystal lattice. It is typically expressed in picometers (pm) or angstroms (Å). Ionic radii depend on the number of electrons an atom has gained or lost to become an ion. When an atom loses electrons to form a positively charged ion (cation), its ionic radius decreases. Conversely, when an atom gains electrons to form a negatively charged ion (anion), its ionic radius increases.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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