the mean free path of an oxygen molecule is 2.0 x 10^-5 when the gas is at a pressure of 120 pa and a temperature of 275 k. The molecular mass of oxygen is 32.0 g/mol the average time interval between collisions of an oxygen molecule is closest to

The image compares the arrangement of electrons in two different neutral atoms. a figure labeled atom q has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has six black spheres. to the left of this figure is another figure labeled atom p. atom p has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has seven black spheres. which of the following best explains the position of the two atoms in the periodic table?