The electron configuration for $C u$ is $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{1} 3 d^{10}$ .
How many valence electrons does copper contain?

1

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2

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8

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11

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Solution

The correct option is A $1$
The valence shell of Cu is fourth shell. Thus its valence electrons are present in $4 s, 4 p$ sub shells. Thus total number of valence electrons is $1$ . Hence answer is option A.

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Similar questions

C u

1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{1} 3 d^{10}

C u

C u

1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2}

C u

1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{1} 3 d^{10}

n = 3

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