Compound a, c6h12o2, was found to be optically active, and it was slowly oxidized to an optically active carboxylic acid b, c6h12o3, by ag(nh3)2. oxidation of a by anhydrous cro3 gave an optically inactive compound d that reacted with zn amalgam/hcl to give 3-methylpentane. with aqueous h2cro4, compound a was oxidized to an optically inactive dicarboxylic acid c, c6h10o4. give structures for compounds a, b, and c; do not specify stereochemistry.

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?