chemistry

 Chemistry is a fascinating science full of unusual trivia. Some of the most fun and most interesting chemistry facts include:

• The only solid elements that assume liquid form at room temperature are Bromine and mercury 
• However, you can melt Gallium by holding a lump in the warmth of your hand.
• Unlike many substances, water expands as it freezes. An ice cube takes up about 9% more volume than the water used to make it.
• If you pour a handful of salt into a full glass of water, the water level will actually go down rather than overflowing the glass.
• Similarly, if you mix half a litre of alcohol and half a litre of water, the total volume of the liquid will be less than one litre.
• A pure element takes many forms. For example, diamond and graphite both are forms of pure carbon.
• Many radioactive elements actually glow in the dark.
• The chemical name for water (H2O) is dihydrogen monoxide.
• The only letter not appearing on the periodic table is J.
• Lightning strikes produce O3, which is ozone, and strengthen the ozone layer of the atmosphere.
• The only two non-silvery metals are gold and copper.
• Although oxygen gas is colorless, the liquid and solid forms of oxygen are blue.