# Problem: Calculate Zeff for the 4s electron in a copper atom, Cu and then Calculate  Zeff for a 3d electron in a copper atom, Cu.

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###### FREE Expert Solution

We’re being asked to calculate the effective nuclear charge (Zeff) of the 4s electron and 3d electron in a copper (Cu) atom

Recall that the effective nuclear charge is the force exerted by the nucleus onto an electron and is given by:

$\overline{){{\mathbf{Z}}}_{{\mathbf{eff}}}{\mathbf{=}}{\mathbf{Z}}{\mathbf{-}}{\mathbf{S}}}$

where Z = nuclear charge or atomic number and S = shielding constant

For this problem, we need to do the following steps:

Step 1: Determine the atomic number.

Step 2: Determine the electron configuration and group them by n-values.

Step 3: Calculate for the shielding constant using Slater's Rules for a 4s electron and 3d electron.

Step 4: Calculate for Zeff for a 4s electron and for a 3d electron.

###### Problem Details

Calculate Zeff for the 4s electron in a copper atom, Cu and then Calculate  Zeff for a 3d electron in a copper atom, Cu.