10. Periodic Properties of the Elements

Which of the following is the correct noble gas notation for the electron configuration of chlorine?

How many electrons are required to completely fill a 2p molecular orbital (MO)?

Which of the following best describes the partial energy level diagram for a hydrogen atom?

How many unpaired electrons are present in a ground state atom of ruthenium (Ru)?

Which of the following is the correct electron configuration for krypton (Kr)?

Which of the following is true when drawing a box (orbital) diagram for the electron configuration of an atom?

Which of the following represents the correct electron configuration for a neutral atom of vanadium (atomic number 23)?

Which of the following represents the correct electron configuration for the V^{3+} ion?

Which of the following electron configurations represents an atom of chlorine (atomic number 17) in an excited state?

Which of the following is the correct orbital notation for boron (atomic number 5)?

Which orbital-filling diagram represents the ground state electron configuration of chromium (Cr, atomic number 24)?

Which of the following represents the correct electron configuration for a neutral atom of nickel (atomic number 28)?

How many electrons can the first energy level (closest to the nucleus) hold before it is full?

Which of the following lists the three fundamental rules that govern the filling of atomic orbitals by electrons?

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