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atomic theory

All things are composed of very small bits of matter that cannot be further

All substances are made up of four elements: fire, air, water and earth

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Dalton's postulates

• Matter is composed of indivisible atoms
• All atoms of any element are identical
• Atoms are neither created nor destroyed during chemical reactions (Law of C
• Atoms of different elements combine in a definite ratio to form compounds(L

plum pudding model-

Planetary model -

Bohr-Rutherford model

Electron cloud model -