10. Periodic Properties of the Elements

Which of the following sketches best represents a 3d atomic orbital?

Which of the following electron configurations represents a phosphorus atom (atomic number 15) in an excited state?

Which one of the following orbitals can hold two electrons?

Which subshells are present in the n = 5 shell?

Which of the following electron orbital diagrams represents a violation of the aufbau principle?

Which of the following best describes the difference between an orbit and an orbital in atomic theory?

How many subshells are present in the n = 4 shell?

If a shell can hold a maximum of 32 electrons, what is the principal quantum number n for that shell?

How many subshells are present in the n = 3 shell?

Which of the following valence electron configurations corresponds to an atom in an excited state?

In the metal complex Na[Co(CO)2(CN)4], how many d electrons are present in the cobalt (Co) atom?