10. Periodic Properties of the Elements

Which of the following is the correct electron configuration for argon (atomic number 18)?

Which of the following represents the correct electron configuration for a neutral neon (Ne) atom?

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

Which of the following represents the correct ground-state electron configuration for the Te^{2-} ion?

In which of the following orbitals would an electron, on average, be closest to the nucleus?

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

In an orbital diagram, which rule states that electrons must occupy orbitals singly before pairing up within a subshell?

Which of the following is the correct electron configuration for sodium (Na)?

Choose the orbital diagram that represents the ground state of n

How many electrons are present in the 4p orbitals of a selenium (Se) atom in its ground state?

Which of the following is the correct electron configuration for the N^{3-} anion?

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

When electrons in an atom become 'excited,' what typically occurs?

Which of the following electron configurations would you expect to belong to a reactive nonmetal?

What is the total number of electrons required to completely fill the first two main energy levels (n = 1 and n = 2) of an atom?