Question

E.C (electronic configuration) of Copper
I'm confused, whether it is [Ar]3d10,4s1 or [Ar]4s2,3d9
Can someone explain me how....
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Answer 1

Answer:-

Electronic configuration of Copper is [Ar]3d¹⁰,4s¹ .

Explanation:-

Copper has ten electrons in 3d orbitals rather than 9 orbitals as expected.

The reason is that fully filled orbitals and half filled orbitals have extra stability.

The fully or exactly filled configurations like p³, p⁶, d⁵, d¹⁰, f⁷, f¹⁴ are thus, more stable.

Hence, to acquire more stability, one of the 4s electron goes into 3d orbital so that the 3d orbital gets completely filled.

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So we can say that the actual electronic configuration of Copper is :-

1s², 2s², 2p⁶, 3s², 3p⁶, 3d¹⁰, 4s¹

∵ Ar = 1s², 2s², 2p⁶, 3s², 3p⁶

Thus, we can write the above configuration of Copper as :-

[Ar]3d¹⁰,4s¹

Answer 2

Required Answer :-

[Ar] 3d¹⁰ 4s¹

Explanation :-

In copper

$\sf \begin{cases} \bf Ten \; electron \; of \; 3d \end{cases}$

Now

The configuration of copper is

$\sf Ar = 1s^2 ,2s^2,3s^2,2p^6,3p^6 = 3d^{10}, 4s^1$

More to know :-

Copper - Copper is a element with atomic number as 29.It's symbol is Cu.

Copper are helpful to us in many ways like making wires, Fencing our house, wire etc.