How does ionic radius change on the periodic table?

Answer 1

Well, we have a problem..........

Typically, metals, electron-rich materials, LOSE electrons to form CATIONS. And if they lose electrons, then the radius of the resultant ion should be DRAMATICALLY smaller than that of the parent atom - especially when we consider that the electrons are removed from the valence shell, which of course determines the atomic radius. On the other hand, non-metals, are electron-poor materials, and typically they gain electrons to form ANIONS, and these have DRAMATICALLY greater radii than their parent atoms.

The given picture is one I use a lot, and it certainly does illustrate what we have argued in the former: anions get larger; cations get smaller with respect to radii. Only problem is it quotes units of #"pm"-=10^-12*m#; a chemist would typically use #"Angstroms"#, i.e. #1xx10^-10*m#........

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Answer 2

Ionic radius generally decreases across a period from left to right and increases down a group on the periodic table.

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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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