•Elements are composed of extremely
small particles, called atoms.
• All atoms of an element are identical (same size, mass, chem. prop).
•The atoms of one element are
different from the atoms of all other elements.
•An atom cannot be created, divided, destroyed or converted into any other type of atom.
•Compounds are composed of atoms of
more than one element in simple whole-number ratios.
•A chemical reaction involves the
separation, combination, or rearrangement of atoms, not their creation or destruction.
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