Atoms and Theories

Question 0

Theory

Answer 0

Explanation of many hypotheses supported by testing

Question 1

Atom

Answer 1

The smallest particle an Element can be divided into

Question 2

What did Democritus propose?

Answer 2

He proposed the first Atomic Theory.

That stated: Atoms are the smallest particles; and that they cannot be Created, Divided, nor Destroyed.

Question 3

Which Greek Philosopher disagreed with Democritus’ Atomic Theory?

Answer 3

Aristotle

Question 4

What are the three points John Dalton made in his Atomic Theory?

Answer 4

I. All substances are made of atoms. Atoms cannot be destroyed, Created, or Divided.

II. Atoms from the same substance are the same; Atoms from different substances are different.

III. Atoms join together to create new substances.

Question 5

What did J.J. Thomson discover in his Plum-Pudding experiment;and whom did it prove wrong?(what #)

Answer 5

Electrons; and it proved John Dalton’s first point wrong

Question 6

What Experiment and model did Rutherford develop? And what did they show?

Answer 6

Gold-Foil Experiment, Atomic Model; that there is a nucleus in the center of the atom and when a electron hits the nucleus it bounces back the same way it came.

Question 7

Nucleus

Answer 7

An Extremely Dense, positively charged core in the atom that holds most of the mass.

Question 8

What did Bohr propose?

Answer 8

He proposed that electrons jump onto different levels.

Question 9

Electron clouds

Answer 9

Area within Atom where most of electrons are found.

Question 10

Empty Space

Answer 10

Area within atom that allow electrons to move freely