10. Periodic Properties of the Elements

Which element has the electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d8?

Which of the following statements correctly describes p orbitals?

Which of the following represents the complete ground state electron configuration for the iron (Fe) atom?

Which atomic symbol represents the noble gas with the electron configuration 1s^2 2s^2 2p^6?

A ground state atom of Mg could not have any electrons with which of the following electron configurations?

Which of the following represents the ground state electron configuration for arsenic (As)?

According to the Aufbau principle, what is the maximum number of electrons that can occupy the third energy level (n = 3) of an atom?

Which of the following diagrams correctly represents the distribution of electrons in the electron shells of a helium atom?

Which change to the electron configuration of nitrogen (atomic number 7) would result in a stable, noble gas configuration?

When writing the electron configuration for plutonium (atomic number 94), which of the following is the correct ending for its configuration?

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

Which of the following best describes the term 'electron orbital'?

According to the aufbau principle, which of the following sublevels is lowest in energy?

Which of the following is the correct ground-state electron configuration for gallium (Ga; Z = 31)?

Which of the following is the correct electron configuration for barium (Ba)?