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Answer:

Atomic radius less than 15%, similar structure and same valency.

Explanation:

The conditions that are favorable for extensive solid solubility of one element in another are the following.

The atomic radius of the solute and solvent atoms must be less than 15%. The structure of both solute and solvent are similar. Solubility completes when both have same valency. Valency means number of electrons in the outermost shell. If both solute and solvent has same number of electrons so it will be completely soluble in each other.

The conditions that are favorable for extensive solid solubility of one element in another is the same size, electrongativity and valency.

What is Hume - Rothery rules?

Hume - Rothery rules are the sets of some important rules which gives idea about the desired condition for the formation of solid solution.

Following main points are described in this rule:

  • Difference between the size of the solute and the solvent should be less than 15%.
  • Electronegativity difference between the solute and solvents should be small.
  • And they both should have same valency, means same no. of electrons in the outermost shell.

Hence size, electronegativity and valency are the conditions.

To know more about Hume - Rothery rules, visit the below link:
https://brainly.in/question/3349695