1. Look up electronegativity values:
* Aluminum (Al): 1.61
* Chlorine (Cl): 3.16
2. Calculate the difference:
Electronegativity difference = 3.16 - 1.61 = 1.55
Conclusion:
The electronegativity difference between aluminum and chlorine in AlCl3 is 1.55. This indicates a polar covalent bond, meaning that the electrons in the bond are not shared equally. Chlorine, being more electronegative, attracts the shared electrons more strongly, creating a partial negative charge (δ-) on the chlorine atom and a partial positive charge (δ+) on the aluminum atom.
