The Great Chemistry!!!!!
 **This website is special for those who want to learn chemistry in the interesting way. This website contains a lot of exercises, interesting experiment in chemistry, notes and also videos to help students understand more about chemistry. | What is Chemistry?
Chemistry is the science of atomic matter, especially its chemical reactions, but also its composition, structure and properties. Chemistry is concerned with atoms and their interactions with other atoms, and particularly with the properties of chemical bonds. Chemistry is sometimes called "the central science" because it connects physics with other natural sciences such as geology and biology. Chemistry is a branch of physical science but distinct from physics. The etymology of the word chemistry has been much disputed. The genesis of chemistry can be traced to certain practices, known as alchemy, which had been practiced for several millennia in various parts of the world, particularly the Middle East.
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Some Chapters in Chemistry and What You Need to know.
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Some Amazing Facts about Chemistry
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Chemistry is a fascinating science, full of unusual trivia! Here are some fun and interesting chemistry facts for you.
- The only elements that are liquid 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.
- There is about 1/2 lb or 250 g of salt (NaCl) in the average adult human body.
- A pure element can take many forms. For example, diamond and graphite both are forms of pure carbon.
- The only letter that doesn't appear 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.
- The human body contains enough carbon to provide 'lead' (which is really graphite) for about 9,000 pencils.
- Hydrogen is the most abundant element in the universe,
while oxygen is the most abundant element in the earth's atmosphere,
crust, and oceans (about 49.5%).
- The rarest naturally-occurring element in the earth's crust may be astatine. The entire crust appears to contain about 28 g of the element.
- Hydrofluoric acid is so corrosive that it will dissolve
glass. Although it is corrosive, hydrofluoric acid is considered to be a
'weak acid'.
- One bucket full of water contains more atoms than there are bucketfuls of water in the Atlantic ocean.
- Approximately 20% of the oxygen in the atmosphere was produced by the Amazon rainforest.
- Helium balloons float because helium is lighter than air.
- Bee stings are acidic while wasp stings are alkaline.
- Hot peppers get their heat from a molecule called capsaicin.
While the molecule acts as an irritant to mammals, including humans,
birds lack the receptor responsible for the effect and are immune to the
burning sensation from exposure.
- Liquid air has a bluish tint, similar to water.
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