4-1

Question 1

The smallest unit of an element that maintains the properties of that element

Answer 1

Atom

Question 2

A subatomic particle that has a negative charge

Answer 2

Electron

Question 3

In physical science, an atom’s central region, which is made up of protons and neutrons

Answer 3

Nucleus

Question 4

A region around the nucleus of an atom where electrons are likely to be found

Answer 4

Electron Cloud

Question 5

A Greek philosopher came up with the original idea that a particle that could not be cut.

Answer 5

Democratis

Question 6

A Greek philosopher who believed that you would never be unable to cut a particle.

Answer 6

Aristotle

Question 7

A British chemist and schoolteacher who created an experiment to see why elements always combined in specific ratios.

Answer 7

Dalton

Question 8

A British scientist discovered that there were small particles inside atoms

Answer 8

Thomson (he used the Cathode-Ray Tube Experiment when an orb was created at the end of the tube)

Question 9

A former student who designed an experiment to test his masters theory

Answer 9

Rutherford (Rutherford’s Gold Foil Experiment where particles passed in different paths)

Question 10

A Danish scientist who studied the way that atoms react with light and later proposed the idea that electrons move around the nucleus in certain paths.

Answer 10

Bohr

Question 11

Two scientists who further explained the nature of electrons in the atom

Answer 11

Shrödinger and Heisenberg