The electron configuration of an atom

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.