The correct order of the ionic radii of is:

Question

The correct order of the ionic radii of  is:

Canvas Classes · Accepted Answer

Isoelectronic series: all have 10 electrons (Ne configuration)

For isoelectronic species, ionic radius increases as nuclear charge decreases (fewer protons = less pull on same number of electrons).

| Ion | Z (protons) | Electrons | Radius (pm) |
|-----|-------------|-----------|-------------|
|  | 13 | 10 | 53 (smallest) |
|  | 12 | 10 | 72 |
|  | 11 | 10 | 102 |
|  | 9 | 10 | 133 |
|  | 8 | 10 | 140 |
|  | 7 | 10 | 146 (largest) |

Increasing order:

Answer: Option (4)

More questions from D & F Block