1. Potassium metal is very reactive with liquid bromine. The result of the reaction is the formation of a white ionic solid. Explain what happens to these elements when they form an ionic compound and write the formula for the ionic compound.
2. Write the correct symbols for the following substances based on the clues given. Then determine to which noble gas they are similar in number of electrons.
A) aluminum ion with 10 electrons
B) sulfur ion with 18 electrons
C) barium ion with 54 electrons