10. Periodic Properties of the Elements

A neutral atom has the following electron configuration: 1s^2 2s^2 2p^6 3s^2 3p^5. Which element is this atom?

Which of the following is the correct electron configuration for the Y^{3+} ion?

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

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

Which of the following is the correct electron configuration for a neutral bromine (Br) atom?

How does the electron-cloud model describe electrons in an atom?

How many electrons does a neutral Fe atom have in its 3d subshell?

How does the movement of electrons change when atoms are in close proximity?

Which of the following is the correct ground-state electron configuration for molybdenum (Mo)?

How many electrons are present in a neutral atom of vanadium (atomic number 23)?

Which of the following represents the electron configuration of an oxygen atom in the ground state?

Which of the following represents the ground state electron configuration for the element neodymium (Nd, atomic number 60)?

Which of the following is the correct electron configuration for antimony (Sb)?

Which of the following is the correct electron configuration for phosphorus (atomic number 15) using core notation?

Which of these elements has an electron configuration of [Kr]5s2?