For each of the molecules listed below Draw electron dot diagrams
Draw stereochemical diagrams
Use VSEPR theory to identify the shape of the molecule
Draw in bond dipoles including resultant vectors
a)CH2S
b)ASCI
c)SeBr
d) CHI3

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.