Which correctly summarizes the trend in electron affinity?it tends to be very high for group 2.it tends to be more negative across a period.it tends to remain the same across periods.it tends to be more negative down a group?

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24-10-2016
Chemistry

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Which correctly summarizes the trend in electron affinity?it tends to be very high for group 2.it tends to be more negative across a period.it tends to remain the same across periods.it tends to be more negative down a group?

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Kalahira Kalahira · Answer 1 · 2017-07-13T14:10:51+02:00

The statement that correctly summarizes the trend in electron affinity is the second option: it tends to be more negative across a period". Electron affinity is the energy absorbed or released by a neutral atom when it absorbs an electron. The more negative the electron affinity the higher the affinity of the atom for an additional electron. So as the electronegativity trends to increase across a period, indicating that the atoms of the left side pull stronger the electrons, the fact that the electron affinity is more negative across a period tells that the atoms to the left accept better an additional electron.

smecloudbird18 smecloudbird18 · Answer 2 · 2022-07-19T15:57:12+02:00

The statement that correctly summarizes the trend in electron affinity is

It tends to be more negative across a period".

So, second option is correct one.

What is electron affinity?

Electron affinity is the energy released by a neutral atom when an electron is added to it to form an anion.

The more negative the electron affinity the higher the tendency to accept of the atom for an additional electron.

Why electron affinity ?

As the electronegativity increases as we move across a period.
It indicates that the atoms of the right side of period pull the electrons strongly.
So, the electron affinity is more negative across a period tells that the atoms to the right of the period accept more an additional electron.

learn about electron affinity.

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