Atomic Structure Model Scientists Flashcard

Front

What did Ernest Rutherford conclude from his Gold Foil Experiment?

Back

The atom is mostly empty space with a tiny, positively charged, dense center called the nucleus.

Front

Who proposed that all matter is made up of tiny indivisible particles called atoms?

Back

Democritus.

Front

What experiment did Robert Millikan use to measure the charge of the electron?

Back

The oil drop experiment.

Front

Who is credited with the discovery of oxygen?

Back

Joseph Priestley.

Front

What are the two kinds of electrical charge named by Benjamin Franklin?

Back

Positive (+) and negative (-) charges.

Front

What is the significance of the nucleus in an atom?

Back

It contains most of the atom's mass and is positively charged.

Front

What is the basic definition of an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

Front

What did the Gold Foil Experiment demonstrate about atomic structure?

Back

It demonstrated that atoms have a small, dense nucleus and are mostly empty space.

Front

What was the main contribution of Democritus to atomic theory?

Back

He introduced the idea that matter is composed of indivisible particles called atoms.

Front

How did Robert Millikan's oil drop experiment contribute to atomic theory?

Back

It provided the first accurate measurement of the charge of the electron.