History

Question 0

Aristotle

Answer 0

All matter made up of 4 different elements: earth, water, fire, air

Question 1

Democritus

Answer 1

Smallest particle called “atomos”

Different particle size and shape might be components of all the diff types of matter

Question 2

Alchemy

Answer 2

Searched for a way to change base metals to gold

Discovered distillation, separation of metals from ores, preparation of some acids

Question 3

Robert Boyle

Answer 3

First person to perform and publish true quantitative experiments

Question 4

John dalton

Answer 4

Propose a theory on matter

1: all matter is composed of small particles called atoms
2: atoms are identical to the same element and different from atoms of other elements
3: atoms of different combine in specific ratios to form compounds
4: in a chemical reaction atoms are separated to form new compounds

Question 5

William Crooke

Answer 5

developed the glass tube discovered that something must be traveling from the cathode to the anode inside the tube even though the air was gone

Question 6

JJ Thomson

Answer 6

discovered the electron and proton

plum pudding structure of the atom

Question 7

Ernest Rutherford

Answer 7

discovered three alpha particles, beta particles and gamma rays
gold foil experiment
- some particles bounced back, suggesting a dense centre- nucleus

Question 8

James Chadwick

Answer 8

discovered the neutron

Question 9

Max Planck

Answer 9

proposed that energy could be shown as particles

-quantum theory

Question 10

Albert Einstein

Answer 10

photoelctric effect

Question 11

Niels Bohr

Answer 11

spectrum