A person changes the oil in his car and discards the old oil into a hole on the ground. What is a possible effect of this action? A
The small amount of oil will create a barrier between it and the groundwater.
B
The small amount of oil will remain sealed in the hole and will not affect groundwater.
C
The small amount of oil will seep through the layers of soil contaminating the groundwater.
D
The small amount of oil will stop when it reaches a harder layer of soil thus not contaminating the groundwater.

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?