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a pair of electrons shared between two atoms in a covalent bond.
the measurements taken by the researcher. The variable that is not dependent on another variable...
the natural circulation of water on, above or below the surface of the Earth.
the movement of particles suspended in a fluid (a liquid or a gas) as a result of being bumped...
6,02 x 1023 particles or objects. Also known as the number of particles in one mole...
a group of very reactive chemical elements that readily lose their one valence electron to form...