Predicting Properties with the Periodic Table

I can use the periodic table as a model to predict the relative properties of elements based on the patterns of electrons in the outermost energy level of atoms.

10:43

We don't generate video — this one is by Khan Academy on YouTube. The practice questions and exit ticket below were drafted by AI for this objective, and every question is editable in the teacher guide.

1. 1

   According to Coulomb's Law, the magnitude of force between two charged particles is proportional to the product of their charges divided by the distance between them squared.

2. 2

   The effective nuclear charge (Zeff) is the charge felt by valence electrons, and it can be approximated by the atomic number minus the number of core electrons.

3. 3

   Ionization energy generally increases as you move up and to the right on the periodic table, while atomic radius generally decreases in the same direction.

“Based on periodic trends, which element, oxygen or sulfur, would you predict to have a higher ionization energy? Explain your reasoning using the concepts of effective nuclear charge and atomic radius.”

Sample answer included in the free materials