how can i write the electron configuration for copper (ii)
http://www.webelements.com/copper/atoms.html
This will give you Cu metal, remove the last two 4s electrons to make Cu^+2.
To write the electron configuration for copper (II), you need to follow a specific pattern. Here's how you can do it:
Step 1: Determine the atomic number of copper. Copper (Cu) has an atomic number of 29.
Step 2: Write the electron configuration of the neutral copper atom. For copper, the electron configuration is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d¹⁰.
Step 3: Determine the charge of copper (II). The Roman numeral "II" indicates a +2 charge.
Step 4: Remove electrons to reflect the charge. Since copper (II) has a +2 charge, we need to remove two electrons from the neutral copper atom.
Step 5: Remove the required electrons. Start by removing them from the highest energy level, or the outermost shell. In this case, remove one electron from the 4s orbital and one electron from the 3d orbital.
Step 6: Rewrite the electron configuration for copper (II) by showing the remaining electrons. After removing the two electrons, the electron configuration becomes 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁹.
So, the electron configuration for copper (II) is 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁹.