All of the following statements about a pure substance are TRUE except: Oit has a specific makeup, or composition
Oit can always be easily separated physically
Oit is a single kind of matter
Oit can be an element or a compound

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?