For example, calcium and phosphorus form a strong foundation for our bones and teeth, while potassium ... elements to function properly. These are almost one-quarter of the periodic table and ...

Lithium, Li Fizzes steadily; slowly becomes smaller until it disappears Sodium, Na Fizzes rapidly; melts to form a ball; quickly becomes smaller until it disappears Potassium, K Burns violently ...

Players read questions about energy levels and score points by picking the correct element as the answer ... the next electron goes into the fourth level. 4th Period: Potassium and Calcium—Electrons ...

A mole is a non-numerical number–like a dozen. When you order a dozen donuts, everyone knows you mean exactly 12 donuts. If ...