10. Periodic Properties of the Elements

How many unpaired electrons are present in a neutral beryllium (Be) atom?

Which of the following represents the electron configuration of silver (Ag) in its ground state?

Which principal energy level is associated with the elements in the fifth row of the periodic table?

How many p orbitals are occupied by electrons in a krypton (Kr) atom in its ground state?

Which of the following represents the correct electron configuration for a neutral atom of boron?

Which of the following statements best describes the rule indicated by the aufbau principle in electron configuration?

How many 6p orbitals exist in an atom?

Which of the following represents the electron configuration of a sulfur atom (atomic number 16) in its ground state?

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

How many electrons can the second electron shell (n = 2) hold?

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

Which of the following is the correct electron configuration for tellurium (Te, atomic number 52)?

Which of the following is the correct abbreviated electron configuration for nickel (atomic number 28)?

In an atom, where are electrons most likely to be found?

Which of the following statements correctly describes the electron configuration of the central oxygen atom in the hydronium ion (H3O+)?