Which of the following statements about VB theory is correct? Choose all that apply.
1) The extent of the orbital overlap is dependent on the orbital shape and direction.
2) The overlapping orbitals of two atoms has 2 pairs of electrons that occupy it.
3) A covalent bond occurs when the orbitals of one atom overlaps with itself.
4) The greater the orbital overlap of the two atoms, the stronger the covalent bond is between them.