The electronic configurations of four element | vedclass

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(B) Let us identify the elements based on their electronic configurations $:-$$(I) \ [Xe] 6s^1$ is Cesium $(Cs)$,an alkali metal. Alkali metals are st

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$(II)$ is a $d-$block element

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(B) Let us identify the elements based on their electronic configurations $:-$$(I) \ [Xe] 6s^1$ is Cesium $(Cs)$,an alkali metal. Alkali metals are strong reducing agents.$(II) \ [Xe] 4f^{14} 5d^1 6s^2$ is Lutetium $(Lu)$. Although it has a $5d^1$ electron,it is classified as an $f-$block element (lanthanoid) because the $4f$ subshell is completely filled.$(III) \ [Ar] 4s^2 4p^5$ is Bromine $(Br)$,a halogen. Halogens have high electron affinity.$(IV) \ [Ar] 3d^7 4s^2$ is Cobalt $(Co)$,a transition metal. Transition metals exhibit variable oxidation states.Therefore,the statement that $(II)$ is a $d-$block element is incorrect,as it is an $f-$block element.

List-$I$ (Elements)	List-$II$ (Properties)
$A. Cl, S$	$I. \text{Elements with highest electronegativity}$
$B. Ge, As$	$II. \text{Elements with largest atomic size}$
$C. Fr, Ra$	$III. \text{Elements which show properties of both metals and non-metals}$
$D. F, O$	$IV. \text{Elements with highest negative electron gain enthalpy}$

Column-$I$	Column-$II$
$A. Z = 37$	$P. p-$ block
$B. Z = 42$	$Q. f-$ block
$C. Z = 34$	$R. d-$ block
$D. Z = 92$	$S. s-$ block

The electronic configurations of four elements are $:-$
$(I) \ [Xe] 6s^1$
$(II) \ [Xe] 4f^{14} 5d^1 6s^2$
$(III) \ [Ar] 4s^2 4p^5$
$(IV) \ [Ar] 3d^7 4s^2$
Select the incorrect statement about these elements $:-$

Similar Questions

Which elements in groups $1$ to $17$ differ in many respects from the other elements of their respective groups?

Identify the incorrect order.

Match the following elements with their respective blocks in the periodic table based on their atomic number $(Z)$:
Column-$I$ Column-$II$
$A. Z = 37$ $P. p-$ block
$B. Z = 42$ $Q. f-$ block
$C. Z = 34$ $R. d-$ block
$D. Z = 92$ $S. s-$ block

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The electronic configurations of four elements are $:-$$(I) \ [Xe] 6s^1$$(II) \ [Xe] 4f^{14} 5d^1 6s^2$$(III) \ [Ar] 4s^2 4p^5$$(IV) \ [Ar] 3d^7 4s^2$Select the incorrect statement about these elements $:-$