In this video excerpt from NOVA's "Hunting the Elements," New York Times technology columnist David Pogue investigates chemical reactions involving sodium. Find out how the electron configuration ...

The polarity of water molecules enables water to dissolve many ionically bonded substances. Salt (sodium chloride) is made from positive sodium ions bonded to negative chloride ions. Water can ...

The positive areas of the water molecules surround the negative Chloride ions. The negative areas of the water molecules surround the positive sodium ions. As the attractions from the water molecules ...

sodium chloride — each molecule consists of one sodium atom and one chlorine atom — is often thought of first as an antifreeze, lowering the freezing temperature of water. That’s why it is ...