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forms between two atoms if the two atoms share six electrons.
the part of the atmosphere that extends to a height of 10 km above the surface of the Earth.
Ultraviolet refers to the portion of the spectrum with frequencies greater than violet light....
a solvent able to dissolve a large number of different chemical compounds. Water is the...
when an organic compound contains a double or triple bond and thus the maximum number of...
a white crystalline organic compound used as a fertilizer, in medicine and in resins.
the electrons in the outermost occupied shell of an atom.
the energy level, or shell, of an atom that contains the valence electrons.