Atomic Theory (Scientists)

Question 1

Democritus

Answer 1

-all matter was formed of smaller pieces that could not be cut into smaller pieces
-“Atomos” - atoms (uncuttable)

Question 2

Aristotle

Answer 2

-all matter was composed of the four elements
~fire air, water, and earth
-elements could be transformed into matter

Question 3

Alchemists

Answer 3

-Philosopher’s Stone
-turn ordinary metals into gold
-discovered modern-day elements and compounds

Question 4

John Dalton

Answer 4

-Father of the Atomic Theory
-elements consist of atoms that cannot be divided
-atoms of the same element are alike and have the same mass
-atoms cannot be changed into another atom of a different element

Question 5

JJ Thomson

Answer 5

-used a Cathode Ray Tube
-discovered Electron
-Plum Pudding Model

Question 6

Ernest Rutherford

Answer 6

-Gold foil experiment
-discovered nucleus
-discovered proton

Question 7

Niels Bohrs

Answer 7

-Bohr model
-electrons move in specific orbits around nucleus

Question 8

Erwin Schrodinger

Answer 8

-Electron Cloud model
-densest area of the cloud is where electrons are

Question 9

James Chadwick

Answer 9

-discovered neutron