Atomic Theory (Physical Science 9th Grade)

The discovery of the electron proved that atoms could be _____

Who believed that matter is composed of a substance called hyle?

What model of the atom was proposed by JJ Thomson

What experiment did Ernest Rutherford conduct?

What subatomic particle has the lightest mass?

What experimental apparatus was used to discover the electron?

Hyle was thought to be composed of earth, fire, wind, air and _____.

Which of the following parts of Dalton's Atomic Theory are no longer viewed as being correct?

What subatomic particle was discovered by JJ Thomson?

JJ Thomson determined that electrons have a _____ charge.

What did Rutherford conclude about the structure of an atom?

Who's theory of matter did society believe for over 2000 years, even though it was incorrect?

sugar dissolved in water is an example of a _____.

Eugen Goldstein discovered the _____.

This individual supported the atomic nature of matter and proposed a 5 part atomic theory.

Who first proposed that everything is made up of atoms?

What caused the particles in the Gold Foil Experiment to be deflected?

Isotopes have the same number of protons and a different number of _____.

Goldstein determined that canal rays had a ____ charge.

The Greek word "atomos" means _____.

A neutron has a _____ charge.

Who discovered the neutron?

The energy required for a solid to turn to a liquid is known as _____.

Using a Mass Spectrometer, JJ Thomson discovered _____.

Who concluded that atoms are mostly empty space?