CBSE Class 12-science Answered
down the group shells increases i.e addition of d&f orbitals .but as we know screening effect is less for d&f orbits so there must be greater pull of outer most electrons then why 1st ionisation potential in decreasing down the group
Asked by nutan sathyanarayanarayanappa | 09 Nov, 2013, 09:34: AM
Expert Answer
As you move down a group, first ionization energy decreases. This is because electrons are further from the nucleus and thus it is easier to remove the outermost electrons.
"SHIELDING" - Inner electrons at lower energy levels essentially block the protons' force of attraction toward the nucleus. It therefore becomes easier to remove the outer electron.
Answered by Vaibhav Chavan | 11 Nov, 2013, 12:51: PM
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