The ions O²⁻, F⁻, Na⁺, Mg²⁺ and Al³⁺ are isoelectronic. Their ionic radii show
- Aan increase from O²⁻ to F⁻ and then decrease from Na⁺ to Al³⁺
- Ba decrease from O²⁻ to F⁻ and then increase from Na⁺ to Al³⁺
- Ca significant increase from O²⁻ to Al³⁺
- Da significant decrease from O²⁻ to Al³⁺
✓ Correct answer: D
Want the full step-by-step reasoning?