Question

Rank the following elements by electron affinity, from most positive to most negative EA value:

tellurium, bismuth, neon, sodium, iodine i tried Te, Bi, Na, I, Ne and it was incorrect.

Answer 1

The correct order of increasing electron affinity from the given elements is: Sodium (Na), Neon (Ne), Bismuth (Bi), Iodine (I), Tellurium (Te).

Step-by-step explanation:

The electron affinity of an element is the energy change that occurs when an electron is added to a gaseous atom to form an anion. Generally, electron affinities become less negative going down a column in the periodic table, except for the elements of the second row which have anomalously low electron affinities. On the other hand, electron affinities become more negative from left to right across a row. Furthermore, the group 15 elements tend to have values that are less negative than predicted.

Based on this information, the correct order of increasing electron affinity from the given elements is as follows:

1. Sodium (Na)
2. Neon (Ne)
3. Bismuth (Bi)
4. Iodine (I)
5. Tellurium (Te)

Therefore, the correct order from most positive to most negative electron affinity value is: Na < Ne < Bi < I < Te.