Explain the large increase in ionization energy needed to remove the third electron from beryllium compared...
Explain the large increase in ionization energy needed to remove the third electron from beryllium compared with that needed for the second electron.
Removal of the third electron requires more energy because it must be removed from a 2+ beryllium ion, which has a(n) _____ ( Stable or Unstable) electron configuration, the same configuration as .
Homework Answers
Beryllium Be
Atomic Number - 4
electronic Configuration - 1S2 2S2
Position in periodic Table - Group no. 2 and Period 2
No. of electron in outer most shell is 2. it is belongs to Alkaline earth metal. valency of Alkaline earth metal is 2 because they have two electron in outermost shell, by removing these electron easily to gain nearest inert gas configuration.
In case of Beryllium after removing two electron it gain inert gas Electronic configuration like Helium which is stable Electronic Configuration.
Be (4) = 1S2 2S2
Be 2+ (2) = 1S2
He (2) = 1S2
Therefore third Ionization Energy is too much higher than the second Ionization energy.
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