Question

Which of the following has a positive value of electron gain enthalpies
(A) N
(B) P
(C) As
(D) Sb

Answer 1

Answer:

sb bcoz of greater size

it will readily loose electron

Answer 2

Answer:

The correct answer is option A

Explanation:

• A positive electron gain enthalpy is defined as the energy required to enter an electron into an atom.
• The elements having completely filled orbital do not accept electrons which makes them difficult. Thus, by applying some heat energy they tend to accept the electron.
• This shows that the element will have a positive gain enthalpy. He and Ne are noble gases, and they won’t accept an electron easily. So, they will have positive electron gain enthalpy. Here the elements N, He, and Ne elements show positive electron gain enthalpy.