Match the items in Column-$I$ with the items in Column-$II$.
Column-$I$ Column-$II$ $(1)$ General electronic configuration of $d$-block elements $(A)$ Transition elements $(2)$ $d$-block elements $(B)$ $(n-1)d^{1-10}ns^{1-2}$ $(3)$ Groups $3$ to $12$ $(C)$ $Z = 58$ to $71$ $(4)$ Lanthanoid elements $(D)$ Last electron enters $d$-orbital
| Column-$I$ | Column-$II$ |
| $(1)$ General electronic configuration of $d$-block elements | $(A)$ Transition elements |
| $(2)$ $d$-block elements | $(B)$ $(n-1)d^{1-10}ns^{1-2}$ |
| $(3)$ Groups $3$ to $12$ | $(C)$ $Z = 58$ to $71$ |
| $(4)$ Lanthanoid elements | $(D)$ Last electron enters $d$-orbital |
(A) The correct matching is as follows:
$(1)$ General electronic configuration of $d$-block elements is $(n-1)d^{1-10}ns^{1-2}$,which corresponds to $(B)$.
$(2)$ $d$-block elements are also known as transition elements,which corresponds to $(A)$.
$(3)$ Groups $3$ to $12$ are defined by the fact that the last electron enters the $d$-orbital,which corresponds to $(D)$.
$(4)$ Lanthanoid elements range from atomic number $Z = 58$ to $71$,which corresponds to $(C)$.
Therefore,the correct sequence is $(1-B, 2-A, 3-D, 4-C)$.
$(1)$ General electronic configuration of $d$-block elements is $(n-1)d^{1-10}ns^{1-2}$,which corresponds to $(B)$.
$(2)$ $d$-block elements are also known as transition elements,which corresponds to $(A)$.
$(3)$ Groups $3$ to $12$ are defined by the fact that the last electron enters the $d$-orbital,which corresponds to $(D)$.
$(4)$ Lanthanoid elements range from atomic number $Z = 58$ to $71$,which corresponds to $(C)$.
Therefore,the correct sequence is $(1-B, 2-A, 3-D, 4-C)$.
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