What is the metallic radius?

Answer 1

Everything is written on the image below:

As you can see, metallic radius is defined as one-half of the distance between the nuclei of two atoms in crystal or between two adjacent metal ions in the metallic lattice.

Metallic radii:
- decrease across the period due to increase in the effective nuclear charge.
- increase down the group due to increase in principal quantum number.

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Answer 2

Peyton Adams

Half the distance between the nuclei of two adjacent atoms in a metallic lattice is commonly used to define the metallic radius, which is the radius of an atom in a metallic state.

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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.