Draw the most stable chair conformation of isomenthol. Draw carefully positioned intersecting arcs to denote all sources of strain for this conformation.

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.