Determine electron affinity, Chemistry

Assignment Help:

Q. How to Determine Electron Affinity?

Ans.

Electron affinity is the measure of an atom's tendency to form a negative ion.

Electron affinity can be measured by the amount of energy released when an electron is added to an atom to form a negative ion.

When forming a negative ion, an atom undergoes the following reaction::

atom + electron (e-) -> negative ion + energy

For example, consider the reaction by which chlorine forms a negative ion:

Cl + e- -> Cl- + 348 kJ / mole

This means that 348 kilojoules of energy are released when 1 mole of electrons is added to one mole of chlorine atoms. The following animation shows this electron affinity reaction of the chlorine atom:

Electron affinity tends to be high for nonmetals and low for metals. The general trend of electron affinity is to increase from left to right in any period and to decrease from top to bottom in a family of elements. For example, fluorine has a very high electron affinity. It is said to be very electronegative.


Related Discussions:- Determine electron affinity

Principal, Principal, azimuthal and magnetic quantum numbers are respective...

Principal, azimuthal and magnetic quantum numbers are respectively related to: (1) Size, shape and orientation (2) Shape, size and orientation (3) Size, orientation and s

Ionisation energy, give two reasons why it is necessary to ionize the chrom...

give two reasons why it is necessary to ionize the chromium atoms

Polarity and salvation, Polarity and salvation   A solvent is a liqu...

Polarity and salvation   A solvent is a liquid medium in which dissolved are known as solutes. Solvents are useful for storing species that would otherwise be in inconvenien

Determine the change in entropy of the system, Two compartments each of 1m ...

Two compartments each of 1m 3 capacity are connected by a valve and insulated from the surroundings and from each other. One compartment contains saturated steam at 683.6 kPa and

Define polar covalent bond, The covalent bond produced by the unequal shari...

The covalent bond produced by the unequal sharing of electrons among the two atoms is known as polar covalent bond.

Chemical equilibria, what do you know about the dynamic nature of chemical ...

what do you know about the dynamic nature of chemical equilibrium?

Which group of elements is called alkaline earth metals, 1st A group becaus...

1st A group because the oxides and hydrides are alkaline in nature.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd