SATHEE: Structure of Atom - Result Question 58

Structure of Atom - Result Question 58

####62. An ion has 18 electrons in the outermost shell, it is

[1990]

(a) $C u^{+}$

(b) $T h^{4 +}$

(d) $K^{+}$

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Solution:

(a) $C u^{+} = 29 - 1 = 28 e^{-}$

thus the electronic configuration of $C u^{+}$ is

$= 1 s^{2} 2 s^{2} 2 p^{6} \underset{18 e^{-}}{\underset{⏟}{3 s^{2} 3 p^{6} 3 d^{10}}}$

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Structure of Atom - Result Question 58

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