Dalton???s Atomic Theory

The Modifications of Dalton’s Atomic Theory

Today, some 215 years after John Dalton proposed his Atomic Theory of Matter in 1808, there are just two modifications that must be made:

Dalton’s Atomic Theory Modifications:

In the 2nd Step ??? atoms of a given element are NOT always identical (isotopes).

In the 5th Step??? atoms CAN be divided further (3 subatomic particles: protons, electrons, and neutrons).

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