The electronic configuration of bivalent europium and trivalent cerium, are: (Atomic Number : Xe = 54, Ce = 58, Eu = 63)

[X e] 4 f^{7}, [X e] 4 f^{1}

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[X e] 4 f^{7} 6 s^{2}, [X e] 4 f^{2} 6 s^{2}

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[X e] 4 f^{2}, [X e] 4 f^{7}

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[X e] 4 f^{4}, [X e] 4 f^{9}

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Solution

The correct option is A $[X e] 4 f^{7}, [X e] 4 f^{1}$
$C e (58) : [X e] 6 s^{2} 4 f_{(g . s)}^{2} C e^{3 +} : [X e] 4 f^{1} E u (63) : [X e] 6 s^{2} 4 f_{(g . s)}^{7} E u^{2 +} : [X e] 4 f^{7}$

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Similar questions

The electronic configuration of Eu³⁺ ion is:

The electronic configuration of gadolinium (Atomic number 64) is
(a) $[X e] 4 f^{3} 5 d^{5} 6 s^{2}$
(b) $[X e] 4 f^{7} 5 d^{2} 6 s^{1}$
(c) $[X e] 4 f^{7} 5 d^{1} 6 s^{2}$
(d) $[X e] 4 f^{8} 5 d^{6} 6 s^{2}$

The electronic configuration of Gd²⁺ is (at. No. of Gd is 64)

Q. Number of non-bonding electron pairs on

X e

X e F_{6}, X e F_{4}

and

X e F_{2}

respectively will be:

Q. The molecules having the same number of lone pair as

X e

are:

(i) X e O_{3}

(i i) X e O F_{4}

(i i i) X e F_{6}

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The electronic configuration of bivalent europium and trivalent cerium, are: (Atomic Number : Xe = 54, Ce = 58, Eu = 63)

The correct option is A [Xe]4f7,[Xe]4f1Ce (58):[Xe]6s24f2(g.s)Ce3+:[Xe]4f1Eu(63):[Xe]6s24f7(g.s)Eu2+:[Xe]4f7

The correct option is A $[X e] 4 f^{7}, [X e] 4 f^{1}$
$C e (58) : [X e] 6 s^{2} 4 f_{(g . s)}^{2} C e^{3 +} : [X e] 4 f^{1} E u (63) : [X e] 6 s^{2} 4 f_{(g . s)}^{7} E u^{2 +} : [X e] 4 f^{7}$