•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.
•
•