Question
Discuss the reactivity of group $15$ elements with halogens.
✓
Answer
Elements of the group $15$ reacts with halogens to form two series of halides i.e., trihalides $(EX_3)$ and pentahalides $(EX_5).$
The pentahalides possess more covalent character due to availability of vacant d orbitals of the valence shell for bonding.
Nitrogen being second period element, does not have $d$ orbitals in its valence shell, and therefore, does not form pentahalides.
Trihalides of the group $15$ elements are predominantly covalent except $BiF_3.$ The only stable trihalide of nitrogen is $NF_3.$
The pentahalides possess more covalent character due to availability of vacant d orbitals of the valence shell for bonding.
Nitrogen being second period element, does not have $d$ orbitals in its valence shell, and therefore, does not form pentahalides.
Trihalides of the group $15$ elements are predominantly covalent except $BiF_3.$ The only stable trihalide of nitrogen is $NF_3.$
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