At the end of this activity, students should be able to: -- state the arrangement of electrons in the individual subshells of an atom -- write the electron configuration of an atom, knowing its atomic number -- give the principles of the classification of elements in the periodic table -- determine which group and period a given element belongs to on the basis of its electron configuration -- determine the electron configuration of an element knowing its position in the periodic table -- describe the formation of positive and negative ions.

Originally released by Learnetic, 2016.