D And F Block Elements Question 7
Question 7 - 2024 (27 Jan Shift 2)
Choose the correct option having all the elements with $d^{10}$ electronic configuration from the following:
(1) ${ }^{27} Co,{ }^{28} Ni,{ }^{26} Fe,{ }^{24} Cr$
(2) ${ }^{29} Cu,{ }^{30} Zn,{ }^{48} Cd,{ }^{47} Ag$
(3) ${ }^{46} Pd,{ }^{28} Ni,{ }^{26} Fe,{ } _2^{24} Cr$
(4) ${ }^{28} Ni,{ }^{24} Cr,{ }^{26} Fe,{ }^{29} Cu$
Show Answer
Answer (2)
Solution
$[Cr]=[Ar] 4 s^{1} 3 d^{5}$
$[Cd]=[Kr] 5 s^{2} 4 d^{10}$
$[Cu]=[Ar] 4 s^{1} 3 d^{10}$
$[Ag]=[Kr] 5 s^{1} 4 d^{10}$
$[Zn]=[\operatorname{Ar}] 4 s^{2} 3 d^{10}$
