10. Periodic Properties of the Elements

Which of the following represents the correct electron configuration for a nitrogen atom (atomic number 7)?

Which of the following represents the correct electron configuration for an aluminum (Al) atom?

Which of the following represents the ground state electron configuration of selenium (Se)?

Which element has the ground state electron configuration 1s^2 2s^2 2p^6 3s^2 3p^6 4s^1?

Which of the following is the correct electron configuration for tellurium (Te)?

Which of the following represents the core electrons in the electron configuration of cobalt (Co, atomic number 27)?

Which orbital notation represents an atom of beryllium (Be) in the ground state?

Which of the following is the correct electron configuration for boron (atomic number 5)?

Which of the following is the correct electron configuration for fluorine (atomic number 9)?

Which of the following statements about the energy levels of electrons in shells is correct?

Which of the following best describes cathode rays?

Which of the following is the complete electron configuration for a neutral fluorine atom?

Which of the following represents the correct electron configuration for a neutral beryllium (Be) atom?

Which of the following electron configurations is impossible?

In the context of electron configuration, where are the electrons located within an atom?