Question

The ratio of ionic radii of Cations i.e. r_C and that of Anions i.e. r_A for stable and unstable ceramic crystal structure is:

1. Less than unity
2. Greater than unity
3. Unity
4. Either lesser of greater than unity

Answer 1

Correct Answer - Option 1 : Less than unity

Explanation:

Ceramic crystals are mostly ionic, the ionic bond is formed by transfer of electrons.

• The ion which loses electrons is called Cation and positively charged
• Due to the attractive force on electrons is more and hence the radius of the cation is smaller than the neutral atom.
• The ion which gains the electrons called Anion. And negatively charged.
• Hence the ratio of cation to anion is less than unity.