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The History of the Atom

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Questions and Answers

Who was the first person to use the term atom?

Democritus

What did Democritus call the fundamental or basic unit of matter?

atom

According to Democritus, what is the theory of the universe?

All matter consists of atoms, which are bits of matter too small to be seen. There is an empty space between atoms. Atoms are completely solid. Atoms have no internal structure. Each atom (of a different substance) is different in size, weight and shape.

Who was the scientist who adapted Democritus' theory into the first modern atomic model?

<p>John Dalton</p> Signup and view all the answers

What are the three main points of John Dalton's atomic model?

<ol> <li>All matter consists of tiny particles called atoms. 2. Atoms are indestructible and unchangeable. 3. Elements are characterized by the unique arrangement of atoms.</li> </ol> Signup and view all the answers