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Dalton's Atomic Theory

Matter consists of indivisible particles called atoms.

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Atomic Lego

Atomic Lego

John Dalton was a 19th century scientist that made the first big leap in the study of atoms after Democritus. Dalton’s study of atoms lead to the atomic theory that has some major components of our modern theory.

In general his beliefs were simmilar to the conditions if atoms were like lego.

-they were small pieces that make up everything else.

-the same kind of lego’s are identical

-they cannot be subdivided

-they can combine to create whole number ratios

-they can be combined separated or rearranged.

In the video, the boy is putting lego’s together to build a shape with a purpose.

Similarly an atom is put together by bonds to build a molecule with a certain purpose.

Now today we know that atoms can be sub divided, we know that atoms of an element are not identical in mass. We know that using nuclear fission we can destroy atoms. However the other rules hold true in today’s modern atomic theory.

Creative Applications:

1. Based on the requirements draw a diagram of Dalton’s Atom?

2. What does Dalton's Theory have that is different to the modern atomic theory?

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