Factor Affecting On Ionization Energy

Factor Affecting On Ionization Energy

i) Atomic Size

I have already publish article about atomic size please if you want to read it click on this link
http://entertainmentme.blogspot.com/2014/03/factor-affecting-on-ionization-energy.html

ii) Shielding Effect
The inside energy level electron block the nuclear force from the valence electron ,
or
The  Nuclear Force which hold the valence electron is dusturb by inner shell electron is called shielding effect

 Trends across the row ( period ) left to right

. As you go across period the number of inside electrons is constant. The number of inside energy levels or shell are constant  As you go across the row the nuclear charge gets larger because a proton is added to the nucleus. As you go across the period, a valence electron is added to the valence shell but the valence electrons have the same shielding effect

Trends across The Group ( top to bottom )

What happens to the attraction to valence electrons as you go down in a group?
  As you go down the group the attraction of the valence electrons to the nucleus decreases because these electrons are further from the nucleus and are better shielded from the nuclear force field.


iii) Nuclear Charge

The net positive charge experienced by an electron in a multi-electron atom is called nuclear charge

Let me tell you simple one

In the center of an atom there is nucleus which contain neutron and proton ,neutron is a neutral charge and proton is a positively charge particle ,so nucleus is positive part of an atom it mean it hold the electron in a shell because electron is a negatively charged particle both charges attract each other so it put the force on electron 

Trends in period

from left to right nuclear charge is increasing because size of an atom remain constant 
so Ionization energy increases from left to right in a periodic table
because it is very difficult to remove an electron from a shell when nucleus putting a strong force on  electron

Trends in group

From Top To Bottom in a group atomic size is increasing due to this extra shell are added in an atom so the distance between nucleus to valence electron is also increasing it mean from top to bottom nuclear charge is decreases ad we can remove the outer most shell electron easily so we can say that when nuclear charge is small ionization energy is also small so ionization energy is decreases from top to bottom

Hope It Will Help You
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Published by Adil khan (mak)