When a small piece of sodium is placed in a petri dish with water and phenolphthalein, the sodium becomes a molten ball and darts around the dish, leaving a pink trail. The reactions of potassium, ...

The diagram shows four different metals reacting with water: A - Lithium (Li) B - Calcium (Ca) C - Silver (Ag) D - Potassium (K) The table shows these metals into an order of reactivity (from most ...

4th Period: Potassium and Calcium—Electrons go into the fourth energy level. A small piece of sodium metal is placed in water. The sodium reacts with the water and gets very hot, producing sodium ...

Study participants with the highest urinary metal levels tended to also have the highest coronary artery calcium (CAC), reported ... limits of metals in air and water and improve enforcement ...