In the periodic table, it is found that elements of Group 2A have positive value of electron affinity while most of the elements have negative electron affinity. Why this is so?

Booster class

AP Chemistry

Skill

Solve problems involving periodic table trends

answer

watching

222

views

For unlimited access to Homework Help, a Homework+ subscription is required.

You have 0 free answers left.
Get unlimited access to 3.8 million step-by-step answers.

Get unlimited access

Already have an account? Log in

1 Sep 2020

Unlock all answers

Get 1 free homework help answer.

Already have an account? Log in

Join us on Discord

Chemistry Study Group

Join now

Related questions

What are the observed periodic trends in electron affinity?

Select all that apply.

1) For main-group elements, electron affinity generally becomes more negative as you move to the right across a row.

2) For main-group elements, electron affinity generally becomes more positive as you move to the right across a row.

3) There is not a corresponding trend in electron affinity going right across a row.

4) For main-group elements, electron affinity generally becomes more negative as you move down a column.

5) For main-group elements, electron affinity generally becomes more positive as you move down a column.

6) There is not a corresponding trend in electron affinity going down a column.

tealweasel435

Electron affinity, EA, is the energy required to add an electron to a neutral gaseous atom and is related to an element's position on the periodic table. Electron affinities can be positive, negative, or zero, as shown in the table.

Element	Electron affinity (kJ/mol)
N (nitrogen)	>0
F (fluorine)	â328
Ca (calcium)	â2

1. Rank the following elements by electron affinity, from most positive to most negative EA value: Ar, I, Rb, P, O.

Electron affinity, $E A EA$ , is the energy required to add an electron to a neutral gaseous atom and is related to an element's position on the periodic table. Electron affinities can be positive, negative, or zero, as shown in the table

For the elements with the electron affinities given in the table in the introduction, which element is most likely to accept an electron?