2
$\begingroup$

The valence electron configuration of $\ce{Cu}$ is $\ce{4s^1 3d^{10}}$. According to this the answer is $11$, but shouldn't it be $1$ since the d shell is already filled up?

$\endgroup$
-2
$\begingroup$

Yes, copper only has 1 valence electron. Remember: valence electrons only include the electrons in the highest energy (n) shell.

| improve this answer | |
$\endgroup$
  • 2
    $\begingroup$ How does it form Cu(II) then? $\endgroup$ – orthocresol Oct 29 '15 at 9:57

Not the answer you're looking for? Browse other questions tagged or ask your own question.