Atomic Theory Flashcard

Front

Who suggested the first atomic theory around 400 BC?

Back

Democritus

Front

What did Democritus believe all things were composed of?

Back

Minute, invisible, indestructible particles of pure matter

Front

What model did J.J. Thompson create to describe the atom?

Back

Plum Pudding Model

Front

Who proposed the revolutionary view of the atom in 1911?

Back

Ernest Rutherford

Front

What did Rutherford's experiment with alpha particles and gold foil demonstrate?

Back

Atoms are mostly empty space with a small, dense nucleus

Front

What did Niels Bohr suggest about the electrons in an atom?

Back

Electrons orbit the nucleus in fixed paths or shells

Front

What did Erwin Schrödinger introduce in his model of the atom?

Back

Wave mechanics

Front

What is Schrödinger's wave equation used for today?

Back

To understand atoms and molecules

Front

What did Bohr's model of the atom emphasize?

Back

The idea of electrons orbiting the nucleus

Front

What was the evidence that Bohr used to support his theory?

Back

The measurement of the line spectrum emitted by hydrogen gas