Question

The elements in group 13 tend to have lower ionization energies than the elements in group 2 because the...

1.full f orbital shields the electron in the p orbital from the nucleus.

2.full s orbital shields the electron in the p orbital from the nucleus.

3.electrons in group 13 elements are closer to the nucleus.

4.atomic radii of group 13 elements are generally bigger.

Answer 1

4. Atomic Radii of group 13 elements are generally bigger.