10. Periodic Properties of the Elements

Which of the following electron configurations represents an atom in an excited state?

Which of the following is the correct electron configuration for helium (He)?

Which of the following best describes what an electron domain consists of?

Which element has the electron configuration 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^{10}?

Which of the following represents the correct electron configuration for a neutral atom of silicon?

How many electrons can occupy the first energy level (n = 1) of an atom?

The more _________ an electron has, the further away it can be from the nucleus.

Which element has the following ground-state electron configuration: [Kr] 5s2 4d10 5p3?

How many electron shells are present in a neutral potassium (K) atom?

Which of the following is the correct electron configuration for the oxide ion, O^{2-}?

What is the electron configuration for a neutral calcium atom?

What is the electron configuration of tellurium (Te)?

Which of the following best describes an electron?

How many electrons can the third energy level (n = 3) hold in an atom?

Which of the following is the correct electron configuration for sulfur (atomic number 16)?