1. List 3 physical properties of sodium and potassium
2. Write the arrangement of electrons in the sodium atom and the potassium atom
3. What is common for the arrangement of electrons in sodium and potassium atoms?
4. Describe the chemical reaction of sodium and potassium with water and write the corresponding equations
5. Write the chemical equation of the synthesis reaction in which the following elements are formed: a) sodium chloride b) potassium chloride​