Why does ncl5

Sign Up. Create your account now. Signup with Email. Gender Male Female. Create Account. Already Have an Account? PCl5 is formed but NCl5 is not why? NEET Question. Answer to Question. Dilip Chaurasiya Feb 23, D orbital absent in Nitrogen. Upvote Raza Great Feb 23, Nitrogen is a 2nd period element which has no vacant d-orbital whereas Phosphorus is the element of 3rd period which has vacant d-orbital. Hence Phosphorus can form bonds with 5 Chlorine atoms but Nitrogen can't.

Prem Darade Mar 08, Upvote 3. Harsh Singh Mar 10, Because nitrogen is much smaller than phosphorus. N cannot partake in d orbital-based hybridization. Second row elements don't have d orbitals. NCl5 would have sp3d hybridization trigonal pyramid which is possible beginning with 3rd Row elements and allows for the expanded octet of the central atom.

In phosphorus, the atoms do not pair up, they bond to their neighboring atoms, thus forming a network of bonding that holds the atoms together into a solid. That is because the nitrogen atom is small and there is simply not enough room around the atom to shoe-horn in five atoms.

Nitrogen is found to have either 3 or 5 valence electrons and lies at the top of Group 15 on the periodic table. It can have either 3 or 5 valence electrons because it can bond in the outer 2p and 2s orbitals.

Valency means number of electron in outer most shell. Atomic number of nitrogen is 7 and as 2 electron will be in l shell and 5 electron in m shell. Outer most shell of nitrogen that has electron is m that has 5 electrons. So, valency of nitrogen is 5. Chemical reactivity of all of the different elements in the periodic table depends on the number of electrons in that last, outermost level, called the valence level or valence shell.

In the case of gold, there is only one valence electron in its valence level. A number of valence electrons are a number of electrons which are present at the outer most shell of the atom. Gold has 79 electrons and has only one electron in the outermost shell and it makes univalent compounds. So, the gold has only 1 one valence electron.

Gold and silver do not react with water at all ,because gold and silver are least reactive and the surface of metallic lead is protected by a thin layer of lead oxide, PbO. Hence, it does not react with water under normal conditions. The surface of metallic lead is protected by a thin layer of lead oxide, PbO. It does not react with water under normal conditions.