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CBSE Class 11-science Answered

What do you mean by de energised and also explain tell why gallium size is smaller than aliminium
Asked by Keshav sultania | 15 Sep, 2013, 05:50: PM
answered-by-expert Expert Answer
The Covalent radii of elements increase down a group. But in going from Al (Z =13, 3s, 3p orbitals) to Ga (Z = 31, 3d,4s, 4p) a block of ten 3d elements (Sc to Zn) intervenes and due to filling of n-1 3d sub-level, there ocuurs constriction in sise.
Answered by | 16 Sep, 2013, 09:18: AM
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