Question

Select all correct statements dealing with electron affinity. a) In general the first electron affinity is: X(g) → X+(g) + e-b) It is the enthalpy change associated with the addition of an electron to a gaseous atom or ion.c) It is the enthalpy change associated with the removal of an electron from a gaseous atom or ion.d) In general the first electron affinity is: X(g) + e- → X-(g)

Answer 1

Option C and D are correct.

Explanations:

What is electron affinity?

Electron affinity is dfined as the energy required to remove en electron from a gaseous atom or molecule. An example of a gaseous atom loosing an electron is given as:

`X(g)+e^-\rightarrow X^-(g)`

From the reaction, you can see that the gaseous element X looses an electron from its outershell to form an ion. This reaction is known as the first electron affinity.

Hence the correct statement dealing with electron affinity are:

• It is the enthalpy change associated with the, removal of an electron, from a gaseous atom or ion.

• In general the, first electron affinity, is:, X(g) + e- → X-(g)