The boiling point of a substance in city a is found to be 145 degrees celcius. the boiling point of the same substance in city b is 141 degrees celcuis. which city, a or b, is at a higher elevation? how do you know?

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.

po-215 i got it right on the quiz