Question

The unpaired electrons in Al and Si are present in 3p orbital. Which electrons will experience more effective nuclear charge from the nucleus?

Answer 1

Configuration of the two elements are:
Al (Z = 13): [Ne]¹⁰3s²³p¹; Si (Z = 14) : [Ne]¹⁰3s²3p²
The unpaired electrons in silicon (Si) will experience more effective nuclear charge because the atomic number of the element Si is more than that of Al.