According to the VSEPR model, What is the primary reason for H₂O to have a smaller bond angle than CH₄?
1) The presence of lone pairs on the central atom in H₂O
2) The presence of lone pairs on the central atom in CH₄
3) The difference in electronegativity between the central atom and the surrounding atoms in H₂O
4) The difference in electronegativity between the central atom and the surrounding atoms in CH₄
