PI3 is unstable and PI5 doesnt exist ?
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PI3 is unstable because the stable valency of P is 1.
PI5 doenst exist because the atom of P is too small to hold the 5 iodine atoms.
PI5 doenst exist because the atom of P is too small to hold the 5 iodine atoms.
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PI3 is unstable due to the weak bonding or overlapping of 3p-5p orbitals. The overlapping is not strong due to which it is unstable. On the other hand, the size of iodine is very large.
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