For elements X, Y, Z, and W, the corresponding valencies and average orbital energies are listed below.
| Element | Valency | Average Valence Orbital Energy (eV) |
|---|---|---|
| X | m | -15 |
| Y | n | -20 |
| Z | o | -5 |
| W | p | -10 |
Based on the Van-Arkel diagram, the correct option from the following is:
A. XnZo is covalent.
B. WmZn is metallic.
C. XmYo is ionic.
D. WpYm is covalent.
Choose the correct option:
1
A, B, and C only
2
A, B, and D only
3
B, C, and D only
4
A and D only