Question

Give the ground state electron configuration of arsenic, Z=28, and draw an orbital-filling diagram, indicating the electrons as up and down arrows

Answer 1

It seems like there is a small error in your atomic number (Z). Arsenic (As) actually has an atomic number of 33, not 28. If you meant to refer to elements with atomic number 28, that would be nickel (Ni). However, I will proceed with arsenic (As, Z = 33) and provide you with the correct ground state electron configuration and the orbital filling diagram.

### Ground State Electron Configuration of Arsenic (As, Z=33):

The electron configuration for arsenic can be written as:
\[
\text{[Ar]} \, 4s^2 \, 3d^{10} \, 4p^3
\]

### Orbital Filling Diagram:

To represent the electron configuration visually using an orbital filling diagram with up and down arrows (where up arrows represent electrons with spin up and down arrows represent electrons with spin down), here's how it looks:

```
↑↓ (1s)
---------------------------------
↑↓ (2s)
---------------------------------
↑ ↑↓ (2p)
↑ ↑↓
↑ ↑↓ (3s)
---------------------------------
↑ ↑ ↑↓ (3p)
---------------------------------
↑ ↑ ↑ ↑ ↑↓ (3d)
---------------------------------
↑↓ ↑↓ (4s)
---------------------------------
↑ ↑ ↑ (4p)
```

### Explanation of the Diagram:
1. Each box represents an orbital.
2. The lines with arrows represent the filling of these orbitals.
3. Electrons fill orbitals according to the Aufbau principle, with lower energy orbitals filling first.
4. For the p orbitals, they must have one electron before any pairing occurs (Hund’s rule).

If you indeed meant an element with atomic number 28 (Nickel), please let me know so that I can provide that configuration and diagram instead!