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water droplets that combine with one another, grow too heavy to stay in the air, and fall to the ground as snow, rain or hail.
a solvent able to dissolve a large number of different chemical compounds. Water is the...
The empirical formula of an ionic compound or a covalent network (macro-molecule) structure. To...
a bond formed when non-metal atoms share a pair of valence electrons to form a molecule.
mass per unit volume of a substance. The number of molecules in a particular area or a measure...
a chemical cell in which electrical energy from a battery is used to produce chemical reactions...