Final answer:
The atomic weight of potassium on the periodic table is 39.0983 amu, with option d being the most precise answer among the given choices. So, the correct answer is d) 39.0983
Step-by-step explanation:
The atomic weight of potassium, as per the periodic table, is 39.0983 amu. This value represents the average mass of all the isotopes of potassium, taking into account their relative abundances. The atomic weight falls closest to option d, which is the most precise answer. While the atomic mass can sometimes be approximated to the nearest whole number for simplicity, the most accurate representation is the one provided with decimal places.