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the natural process in which carbon circulates though an ecosystem.
the time required for half the atoms present in an object have undergone radioactive decay and...
single superphosphate fertiliser (SSP) is manufactured by adding sulfuric acid to phosphate...
electrons that have become removed from the atom and form a âseaâ or region to which the...
four shared electrons, or two shared pairs of electrons (or two covalent bonds) between the same...
forces of attraction between two naturally occurring dipoles.