Question

order of electron gain enthalpy of 15 group​

Answer 1

The order of electron gain enthalpy of group 15 is  N > P > As > Sb > Bi .

We have to write the order of electron gain enthalpy of group 15.

Electron gain enthalpy : It is the amount of energy released after adding an electron to an isolated gaseous atom.

For example,

If A is an atom and we want to add e⁻ into it.

A + e⁻   ⇄ A⁻ + Q,

Here Q is nothing but electron gain enthalpy of A.

For group 15 : N , P, As , Sb , Bi.

Concept : Electron gain enthalpy decreases down for the groups but increase from left to right in the periods in a periodic tables, It is because electrons added to the energy level become closer to the nucleus. thus, a stronger attractive force acts between nucleus and electrons.

From above explanation, we get N > P > As > Sb > Bi [ including their negative sign ]

Therefore the order of electron gain enthalpy of group 15 is  N > P > As > Sb > Bi .

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