Question
Wed March 16, 2011 By: Shree Varshini

justify with suitable example ionisation energy decreases down the group in a periodic table.

Expert Reply
Wed March 16, 2011
Dear Student
 
As we move down the group, the size of the atoms increases. The effective nuclear force decreases, so the electrons are easily removed. This is the reason why the ionization energy decreases down a group.
Example
O>Se>Te
 
 
We hope that clarifies your query.
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Team
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