Here's how to determine the type of bond between As (arsenic) and Al (aluminum) using electronegativity:

1. Find Electronegativity Values:

* As (arsenic): Electronegativity = 2.18

* Al (aluminum): Electronegativity = 1.61

2. Calculate the Electronegativity Difference:

* Subtract the smaller electronegativity value from the larger one: 2.18 - 1.61 = 0.57

3. Interpret the Electronegativity Difference:

* 0.0 - 0.4: Nonpolar covalent bond (electrons are shared equally)

* 0.4 - 1.7: Polar covalent bond (electrons are shared unequally)

* 1.7 - 3.3: Ionic bond (electrons are transferred)

4. Conclusion:

The electronegativity difference of 0.57 falls within the range of polar covalent bonds.

Therefore, the bond between As and Al will be a polar covalent bond.