Explore Atomic Theory Foundations

Front

Democritus, who lived in Greece during the fourth century B.C., suggested that matter is made up of tiny particles that cannot be divided. He called these particles ____________________.

Back

atoms

Front

The modern process of discovery about atoms began with the theories of an English schoolteacher named ____________________.

Back

John Dalton

Front

Suppose you could grind a sample of the element copper into smaller and smaller particles. The smallest particle that could no longer be divided, yet still has the chemical properties of copper, is __________.

Back

an atom

Front

Atom is from a Greek word 'atomos' that means

Back

incapable of being cut

Front

What did John Dalton state?

Back

Elements are made of atoms; atoms of a given element are identical; atoms cannot be subdivided, created, nor destroyed; all of the above.

Front

Which scientist stated all matter is made up of atoms, the atoms are all the same for one substance, and different for different substances?

Back

Dalton

Front

Smallest unit of an element

Back

atom

Front

What is the tiniest particle that retains its properties?

Back

atoms

Front

All of the following are true about Democritus' atomic theory EXCEPT ______.

Back

Atoms are composed of subatomic particles