Examlex
Statistics are derived from a database by means of a ___________.
Compound
A substance formed by the chemical combination of two or more elements in fixed proportions.
Chemical Bonds
The attractive forces that hold atoms together in molecules or crystals, forming as a result of sharing or transferring electrons between atoms.
Molecule
The smallest particle of a chemical substance that can exist independently while retaining the chemical properties of the substance.
Atoms
The basic unit of a chemical element, consisting of a nucleus of protons and neutrons, and surrounded by electrons.
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