What distinguishes a chemical property from a physical property? A. Chemical properties describe the characteristics of a substance that are directly observable without changing the substance.

B. Chemical properties are only observable when a substance changes into a new substance.

C. Chemical properties always change depending on temperature or pressure.

D. Chemical properties only describe subjective characteristics that cannot be measured with scientific tools.

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?