Imagine yourself in the shoes of Dimitri Mendeleev. You are provided with two sets of cards that list properties of various elements. These cards resemble the cards used by Mendeleev when he grouped elements. One set of cards lists the names of known elements and their properties, while the other set of cards lists the properties of a few unknown elements. These sets are shown below:
Part A: now using your periodic table as a reference, type the symbol for the known element into their appropriate groups and periods in the modified table below. Note that we're using the international group numbers (1-18), followed by the American scheme for the A-group elements in parentheses.
Part B Now inspect the properties of the unknown elements, compare them to the properties of your known elements and see where the unknown element best fits in the table above. Once you've done that, use your periodic table to identify each unknown element below
Part C: Write down the names and full electron configurations of the unknown elements you identified above