This page describes the reactions of the Period 3 elements from sodium to argon with water, oxygen and chlorine. Sodium has a very exothermic reaction with cold water producing hydrogen and a colourless solution of sodium hydroxide. Magnesium has a very slight reaction with cold water, but burns in steam.
Guinness World Records lists the Mona Lisa as having the highest insurance value for a painting in history. On permanent display at The Louvre museum in Paris, the Mona Lisa was assessed at US$100 million on December 14, 1962. Taking inflation into account, the 1962 value would be around US $780 million in 2014 dollars