Which of the following is a transition elemen | vedclass

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(C) transition element is defined as an element which has an incompletely filled $d$-orbital in its ground state or in any of its oxidation states.The

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$Ni$

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(C) transition element is defined as an element which has an incompletely filled $d$-orbital in its ground state or in any of its oxidation states.The general electronic configuration of transition elements is $(n-1)d^{1-10} ns^{1-2}$.$Ni$ (Nickel) has the atomic number $28$ and its electronic configuration is $[Ar] 3d^8 4s^2$. Since it has a partially filled $d$-subshell,it is a transition element.$Al$ (Aluminum) is a $p$-block element.$As$ (Arsenic) is a $p$-block element.$Rb$ (Rubidium) is an $s$-block element.Therefore,the correct option is $C$.

Which of the following is a transition element?

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