It is because of inability of electrons of the valence shell to participate in bonding that :

Question

It is because of inability of  electrons of the valence shell to participate in bonding that :

Canvas Classes · Accepted Answer

🧠 The Bond Inhibition Factor
The "Inert Pair Effect" is like a pair of electrons that decides to stay home and not go out to play (bond). In heavy Group 14 elements like Lead (), the outer  electrons are drawn so tightly to the nucleus that they don't participate in bonding easily.

🗺️ The Stability Trend
1. The Phenomenon: For heavy -block elements, the lower oxidation state (Group valence ) becomes more stable than the characteristic group oxidation state.
2. Stability Shift:
   - Tin (): Sm

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