Name: Oxidising Nature of Potassium Permanganate
Uploaded: 2019-07-19
Duration: 7 min 2 s
Description: Potassium permanganate is a very strong oxidising agent, widely used in the chemical industry and laboratories. Let us learn more through this video.

Question

Fill in the blanks with correct outer electronic configurations.

$2^{nd}$ series
	$Y$	$Zr$	$Nb$	$Mo$	$Tc$	$Ru$	$Rh$	$Pd$	$Ag$	$Cd$
$Z$	$39$	$40$	$41$	$42$	$43$	$44$	$45$	$46$	$47$	$48$
valence shell electronic configuration	$4 d^{1} 5 s^{2}$	$4 d^{2} 5 s^{2}$	$4 d^{4} 5 s^{1}$		$4 d^{6} 5 s^{1}$		$4 d^{5} 5 s^{2}$	$Y$		$Tc$

Accepted Answer

$4 d$ –series consists of elements from $Y$ (atomic number $39$ ) to $Cd$ (atomic number $48$ ). These elements lie in the $Y$ th period of the periodic table. In this series, the differentiating electron occupies $4 d$ orbitals, i.e., the elements of this series involve the progressive filling of $Nb$ orbitals as we proceed from $Y_{39}$ to ${Cd}_{48}$ . In this series there are more elements which have anomalous configurations. The elements having anomalous configuration are $Rh$ and $42$ (six elements). These anomalous configurations are explained on the basis of nuclear–electron and electron–electron forces existing in these atoms. Complete and valence–shell electronic configuration of the atoms of $4 d$ –series elements can be written as follows.

$2^{nd}$ series

$Y$ $Zr$ $Nb$ $Mo$ $Tc$ $Ru$ $Rh$ $Pd$ $Ag$ $4 d^{4} 5 s^{1}$

$Z$ $39$ $40$ $41$ $42$ $43$ $44$ $45$ $46$ $47$ $48$

valence
shell
electronic
configuration $4 d^{1} 5 s^{2}$ $Pd$ $4 d^{4} 5 s^{1}$ $4 d^{5} 5 s^{1}$ $4 d^{6} 5 s^{1}$ $48$ $4 d^{1} 5 s^{2}$ $4 d^{2} 5 s^{2}$ $4 d^{4} 5 s^{1}$ $4 d^{10} 5 s^{2}$

Here $[Kr]_{36} = 2, 8, 18, 8$ (four shells). Complete configuration $= [Kr]_{36} 4 d^{1 - 10} 5 s^{0 - 2} = 2, 8, 18, (8 + [1 to 10])$ , $0$ to $2$ (five shells); which is otherwise written as $2, 8, 18, (9 to 18), 0 to 2; i . e ., 2, 8, 18, 4 s^{2} p^{6} d^{1 - 10}, 5 s^{0 - 2}$ . Valence–shell configuration $= 4 d^{1 - 10} 5 s^{0 - 2}$

$3^{rd}$ series
	$0$	$Hf$	$Ta$	$W$	$Re$	$Os$	$Ir$	$Pt$	$Au$	$Hg$
$Z$	$57$	$72$	$73$	$74$	$75$	$76$	$77$	$78$	$79$	$80$
valence shell electronic configuration	$5 d^{1} 6 s^{2}$		$5 d^{3} 6 s^{2}$	$5 d^{4} 6 s^{2}$		$5 d^{6} 6 s^{2}$	$5 d^{7} 6 s^{2}$	$5 d^{9} 6 s^{1}$		$5 d^{10} 6 s^{2}$

$4^{th}$ series
	$Ac$	$Rf$	$Db$	$Sg$	$Bh$	$Hs$	$Mt$	$Ds$	$Rg$	$Cn$
$Z$	$89$	$104$	$105$	$106$	$107$	$108$	$109$	$110$	$111$	$112$
valence shell electronic configuration	$6 d^{1} 7 s^{2}$	$6 d^{2} 7 s^{2}$		$6 d^{4} 7 s^{2}$	$6 d^{5} 7 s^{2}$	$6 d^{6} 7 s^{2}$	$6 d^{7} 7 s^{2}$	$6 d^{8} 7 s^{2}$	$6 d^{10} 7 s^{1}$	$6 d^{10} 7 s^{2}$

Important Questions on Transition and Inner Transition Elements

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Fill in the blanks with correct outer electronic configurations. 2nd series Y Zr Nb Mo Tc Ru Rh Pd Ag Cd Z 39 40 41 42 43 44 45 46 47 48 valence shell electronic configuration 4d15s2 4d25s2 4d45s1 4d65s1 4d55s2 4d105s0 4d105s2

Important Questions on Transition and Inner Transition Elements

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