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The ratio of cationic radius to anionic radius in an ionic crystal is greater than 0.732. Its co-ordination number is
- a)8
- b)6
- c)4
- d)1
Correct answer is option 'A'. Can you explain this answer?
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The ratio of cationic radius to anionic radius in an ionic crystal is ...
Explanation:
Ionic crystals are composed of cations and anions arranged in a three-dimensional lattice structure. The ratio of the cationic radius to the anionic radius is an important factor that determines the packing of ions in the crystal lattice.
The co-ordination number is the number of anions surrounding a cation or the number of cations surrounding an anion in the crystal lattice. The co-ordination number depends on the size of the ions and the ratio of their radii.
According to the Pauling's rule, the ratio of cationic radius to anionic radius in an ionic crystal should be between 0.414 and 0.732 for the crystal to be stable. If the ratio is less than 0.414, the crystal lattice becomes unstable due to repulsive forces between the ions. If the ratio is greater than 0.732, the crystal lattice becomes unstable due to the large size of the cation, which cannot be accommodated by the anions.
Therefore, if the ratio of cationic radius to anionic radius in an ionic crystal is greater than 0.732, the co-ordination number will be 8. This is because the large cation will be surrounded by 8 anions, which will be arranged in a cubic lattice around the cation.
Hence, the correct answer is option A.
Ionic crystals are composed of cations and anions arranged in a three-dimensional lattice structure. The ratio of the cationic radius to the anionic radius is an important factor that determines the packing of ions in the crystal lattice.
The co-ordination number is the number of anions surrounding a cation or the number of cations surrounding an anion in the crystal lattice. The co-ordination number depends on the size of the ions and the ratio of their radii.
According to the Pauling's rule, the ratio of cationic radius to anionic radius in an ionic crystal should be between 0.414 and 0.732 for the crystal to be stable. If the ratio is less than 0.414, the crystal lattice becomes unstable due to repulsive forces between the ions. If the ratio is greater than 0.732, the crystal lattice becomes unstable due to the large size of the cation, which cannot be accommodated by the anions.
Therefore, if the ratio of cationic radius to anionic radius in an ionic crystal is greater than 0.732, the co-ordination number will be 8. This is because the large cation will be surrounded by 8 anions, which will be arranged in a cubic lattice around the cation.
Hence, the correct answer is option A.
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The ratio of cationic radius to anionic radius in an ionic crystal is ...
The ratio of cationic radius to anionic radius in an ionic crystal is greater than 0.732 which corresponds to cubic coordination. Its co-ordination number is 8.
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The ratio of cationic radius to anionic radius in an ionic crystal is greater than 0.732. Its co-ordination number isa)8b)6c)4d)1Correct answer is option 'A'. Can you explain this answer?
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