At 98.66 kPa nitrogen has a solubility in water of 0.018 g/L. Determine the pressure at which nitrogen's solubility is 0.015 g/L.

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.

i would say b

explanation:

but i think i would need more information than that