How many valence electrons does $C u$ $Cu$ have?

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Answer 1 · 2018-04-17T16:25:05

1

The electronic configuration of $C u$ $Cu$ is

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

In its valence shell (the fourth), Cu has 1 electron

How many valence electrons does CuCu have?