Interpretation:
The two ways to define an atomic radius needs to be shown. When each method is used needs to be explained.
Concept introduction:
The atomic radius of a particular element is the measure of the atoms size. It can also be defined as the distance between the nucleus of the element to its boundary.
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Answer to Problem 68A
Diagram (a) indicates that the atomic radius of a given metal can be defined as half the distance between two adjacent atoms in the crystal and in diagram (b) indicates that the atomic radius of a given non-metal can determined from a molecule of two identical atoms.
Explanation of Solution
Diagram (a) indicates that the atomic radius of a given metal can be defined as half the distance between two adjacent atoms in the crystal.
An example of it is, in Sodium atoms, the atomic radius is the one-half distance between the centers of the adjacent atoms.
Diagram (b) indicates that the atomic radius of a given non-metal can determined from a molecule of two identical atoms.
An example is, in H2molecule, the atomic radius can be determined from a molecule of two identical Hydrogen atoms.
In metals, the atomic radius can be defined as half the distance between two adjacent atoms in the crystal and in non-metal the atomic radius can be determined from a molecule of two identical atoms.
Chapter 6 Solutions
Chemistry: Matter and Change
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