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

Thermochemistry, enthalpy of formation of acetic acid

enthalpy of formation of acetic acid

Chloroform or trichloromethane - organic chemistry, Chloroform or trichloro...

Chloroform or trichloromethane, CHCl 3 It is a significant trihalogen derivative of methane. It was given by Liebig in year 1831 and its name chloroform was proposed by Dumas

Quantum numbers for an electron of an atom is not possible, Which set of qu...

Which set of quantum numbers for an electron of an atom is not possible: (1) n=1 l=0, m=-0, s= +1/2   (2) n=1, l=1, m=-1, s= +1/2  (3)  n=1, l=0, m=0, s= -1/2   (4) n=

A metal surface is exposed to solar radiations, A metal surface is exposed ...

A metal surface is exposed to solar radiations: (1) The emitted electrons have energy less than a maximum value of energy depending upon frequency of incident radiations

Antipyretics, chemistry and mechanism of action

chemistry and mechanism of action

Equivalent conductance of sodium acetate, When a certain cell was filled wi...

When a certain cell was filled with 0.02N KCl solution, the resistance was 350ohm when the same cell was filled with 0.01N eq solution of sodium acetate the resistance was 1158ohm.

Explain the term production, Production Sensory analysis does not stop...

Production Sensory analysis does not stop after the  product has been developed and is being produced routinely. However, it is critical that products continue to be analyzed

Determine the order of increasing energy, The atomic orbitals are progressi...

The atomic orbitals are progressively filled in order of increasing energy. This principle is called as: (1) Hund's rule (2)Aufbau principle (3) Exclusion principle (4

Containing 2 alcohol functional groups, Consider the diols (containing 2 al...

Consider the diols (containing 2 alcohol functional groups) of molecular formula C 5 H 12 O 2 (a) Illustrate all the possible structural isomers.  (b) Label the stereogenic

Acids, what are similarities and differences among the Arrhenius, Bronsted-...

what are similarities and differences among the Arrhenius, Bronsted-Lowry, and Lewis acid-base theories?

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