If the volume of a ping pong ball is approximately 100.0 cm ³, how many ping pong balls could you put in an empty science laboratory whose dimensions are 15.2 m, 8.2 m, 3.1 m?

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?