The standard enthalpies of formation of so2 and so3 are ‐297 and ‐396 kj/mol respectively. calculate the standard enthalpy of reaction for the reaction: so2(g) + 1/2 o2(g) --> so3 (g)

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?