core
a. Atom is the smallest part of an element that can not be divided again
b. The atoms of an element are all similar and can not be turned into atoms of other elements
c. Two or more atoms of different elements can form a molecule
d. On a chemical reaction, atoms are split and then joined again with different arrangements of had originally, but the total mass remains
e. Atom can not be created, split or destroyed.
weakness
- Can not explain the electrical properties of the atom.
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