The periodic table is helpful in all the following endeavors but one. Which is the exception?

Question

Quizplus · Accepted Answer

The periodic table can predict the number of isotopes of an element based on its atomic mass, but it cannot predict the exact types of isotopes present in nature. Isotopes are determined experimentally through mass spectrometry and other methods. However, the periodic table is useful for predicting the other choices listed (chemical reactivity, physical properties, and formula of compounds).

The Periodic Table Is Helpful in All the Following Endeavors