Electron affinity

-

Definition of electron affinity

 

Electron affinity can be termed as the energy released to ad an electron with an atom.

 Explanation of Electron affinity


Electron affinity is the opposite term of ionisation energy. Where ionisation energy
 or ionisation potential means the requirement of energy to release electron from nutral atom or ion there electron affinity means the release of energy to ad an electron with atom or ion. Let a positive ion or a neutral atom are going to convert into a negatively charged ion by addition of an electron from outside. To do this there need some electron to release. This released electron is called electron affinity. Electron affinity may be classified into different class. First electron affinity and second electron affinity, etc. First electron affinity is the energy releasing for adding first electron with atom in gaseous state. On the other hand the released energy to adding the second electron with atom is called second electron affinity.


 Examples of electron affinity



Chlorine is an element of halogen group and chlorine is considered as nutral atom with zero charge to which an electron will add.

An electron added with neutral chlorine and chlorine converted into chloride ion. In course of converting some energy will release. This energy is termed as electron affinity.

Popular posts from this blog

Black hole

-
Black hole is a region of spacetime that pocess such kinds of gravitational pole where nothing can escape from it, even particles and electromagnetic wave.  General theory of relativity by Albert Einstein can give an idea of creating black hole. According to  general theory of relativity sufficient amount of compact mass can form spacetime that leads to form black hole. Black hole may be in three types. Micro types, stellar massive and supermassive.  There consider of a boundary of a black hole, that is called event horizon. Event horizon is such kinds of boundary region of black hole from where no escape is possible. Black hole may be compared with the nature of black body, because like black body, black hole do not reflects light. Simply, it is said that what a things matter or light fall into black hole have no chance of return back.  In quantum field theorem it have that event horizon can emite a radiation which is called Hawking radiation . How black...
Read more

Mass energy transformation equation

-
Image
Einstein's mass energy transformation equation Albert Einstein established an equation that explains the relationship between mass and energy. This equation also explains how matter transform into energy. It is also called mass energy transformation equation. Mathematically mass energy transformation equation is expressed as bellow, E = mc² From above equation the symbol E is denoted for energy, m is for mass and c is for speed of light. Matter and energy inter transformation Matter can transform into energy explained by Einstein's mass energy transformation equation. In opposite manner energy also can transform into matter. If it was impossible to transform energy into mass then it was impossible to form our existing universe. Think about Big Bang. The first nucleus of the universe was created after three minute of Big Bang. What was the initial state before the Big Bang? An analysis of big bang theory shows that after big bang a hot and dense energy state starte...
Read more

Attractive force

-
The force acting among the objects that tends to closer together is attractive force. The opposite concept of attractive force is repulsive force. Repulsive force tends the particle to go away as far as possible. within an electrostatic force there exist both attractive force and repulsive force. Centripetal force tends to electron to go to nucleus and centrifugal force tends electron far away from the nucleus. Within a magnet we find that opposite pole of magnet attract each other and same pole of magnet repulse each other. Same electric charge repulse each other and opposite electric charge attract each other.
Read more