Fill in the name and empirical formula of each ionic compound that could be formed from the ions in this table: cation 2 2- Ba 3- Ma anion NO, CIO Bro PO, some ionic compounds empirical formula 0 0 0 0 name of compound 0 0 0 0 X

Iii (he Lewis structures listed here, M and X represent various elements iii the third period of the periodic table. Write the formula of each compound using the chemical symbols of each element: (a) (b) (c) (d)

A representative element (X) forms an ion with a 2 charge. What is the a. Roman numeral group number for element X b. Lewis symbol for element X c. number of valence electrons possessed by X d. the chemical formula of the compound formed between X and the Ca2+ ion

Occasionally, we will see an ionic compound that has a 1 counterion. (Later we will find that 1 counterions are often more than spectators and take an active role in many reactions.) a. What elements (other than H) on the periodic table are most likely to form a 1 anion? b. Draw a Lewis structure for the ionic compound NH4Cl (Hint. One atom is a 1 counterion).