(C) The electronic configuration is $1s^2 2s^2 2p^6 3s^2 3p^6 3d^3 4s^2$.For $d$-block elements,the group number is determined by the sum of $(n-1)d$

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(C) The electronic configuration is $1s^2 2s^2 2p^6 3s^2 3p^6 3d^3 4s^2$.For $d$-block elements,the group number is determined by the sum of $(n-1)d$ electrons and $ns$ electrons.Here,the number of electrons in the $(n-1)d$ subshell is $3$ and in the $ns$ subshell is $2$.Total electrons $= 3 + 2 = 5$.Therefore,the element is placed in the $5^{th}$ group of the periodic table.

Class 11 Chemistry Classification of Elements and Periodicity in Properties Extended or long form of periodic table

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If an atom has electronic configuration $1s^2 2s^2 2p^6 3s^2 3p^6 3d^3 4s^2$,it will be placed in

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Second group
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Third group
C
Fifth group
D
Sixth group

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Class 11

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Classification of Elements and Periodicity in Properties

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Extended or long form of periodic table

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If the $IUPAC$ name of an element is $Unununnium$,then the element belongs to the $n^{th}$ group of the periodic table. The value of $n$ is . . . . . .

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The Modern Periodic Table is based on the atomic number. Explain this with a table.

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Which of the following electronic configurations represents representative elements?

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Element $E$ belongs to the period $4$ and group $16$ of the periodic table. The valence shell electron configuration of the element,which is just above $E$ in the group is $.....$

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Who developed the long form of periodic table?

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If an atom has electronic configuration $1s^2 2s^2 2p^6 3s^2 3p^6 3d^3 4s^2$,it will be placed in

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If the $IUPAC$ name of an element is $Unununnium$,then the element belongs to the $n^{th}$ group of the periodic table. The value of $n$ is . . . . . .

The Modern Periodic Table is based on the atomic number. Explain this with a table.

Which of the following electronic configurations represents representative elements?

Element $E$ belongs to the period $4$ and group $16$ of the periodic table. The valence shell electron configuration of the element,which is just above $E$ in the group is $.....$

Who developed the long form of periodic table?

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