If the volume at a certain temperature is 40 mL and suddenly pressure is doubled, then the volume would be..

where's the diagram?

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.

6.4 cm (max) - 25 cm (min)

1 is the answer to this problem