Question

1. draw the electronic configuration diagram for cu. these are the boxes, lines, or circles filled with the arrows written in a line, not stacked. this is for exam practice.
2. how many electrons were used? input the answer here.

Explanation:

Step1: Determine the atomic number of Cu

The atomic number of copper (Cu) is 29.

Step2: Recall the electron - filling rules

Electrons fill orbitals in the order of increasing energy. The orbital filling order is \(1s<2s < 2p<3s<3p<4s<3d\). The \(s\) sub - shell has 1 orbital (holds 2 electrons), the \(p\) sub - shell has 3 orbitals (holds 6 electrons), and the \(d\) sub - shell has 5 orbitals (holds 10 electrons).

Step3: Write the electron configuration

The electron configuration of Cu is \([Ar]3d^{10}4s^{1}\) (due to the stability of the fully - filled \(d\) sub - shell). The total number of electrons is equal to the atomic number.

Answer:

29