Stability of Nan3 compared to NH3
Nan3 is more stable than NH3 due to several reasons. Let's break down the factors contributing to this stability:

Electronic Configuration:
- Na has a completely filled outermost shell with 8 electrons, making it stable.
- N has 5 electrons in its outer shell, needing 3 more electrons to achieve a stable octet.

Charge:
- In NaN3, Na has a +1 charge, while N has a -3 charge, balancing the overall charge of the compound.
- In NH3, N has a +3 charge, making the compound less stable due to the presence of a highly charged species.

Bonding:
- Nan3 forms ionic bonds between Na+ and N3- ions, which are stronger and more stable compared to NH3's covalent bonds.
- The ionic bond in Nan3 is stronger due to the complete transfer of electrons from Na to N, leading to a stable structure.

Size:
- Na is a larger atom compared to H, leading to better dispersion of charge and increased stability in the compound.

Conclusion:
Overall, the combination of electronic configuration, charge, bonding, and size factors contributes to Nan3 being more stable than NH3. This stability is crucial in determining the properties and reactivity of the compounds in various chemical reactions.