ABSTRACT
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Water is the most popular and most important chemical compound on our planet. It is a major chemical constituent of the Earth’s surface and it is the only substance that is abundant in solid, liquid, and vapor form. Because it is ubiquitous, it seems to be a mild and inert substance. In fact, it is a very reactive compound characterized by unique physical and chemical properties that make it very different from other popular liquids. The peculiar water properties determine the nature of physical and biological world.
