Which one of the following elements is unable to form ion?

Question

Which one of the following elements is unable to form  ion?

Canvas Classes · Accepted Answer

🧠 The Orbitals Gap
Forming a hexacoordinated ion like  requires the central atom to "expand" its octet. This expansion demands the presence of empty -orbitals in the valence shell.

🗺️ The Period 2 Limitation
1. Boron's Configuration: Boron () belongs to the second period.
2. The Shell Constraint: In the  shell, only  and  orbitals exist. There are no  orbitals.
3. The Result: Boron can have a maximum coordination number of  (using its one  and three  orbitals). It cannot accommodate six fluor

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