important people

Question 1

Dalton

Answer 1

All matter is made up of small particles called atoms
Atoms cannot be created, destroyed or divided into smaller parts
All atoms of the same element have the same mass but different elements have different
masses
Put two elements together and you get a compound
Chemical reactions change the way atoms are grouped but atoms themselves do not
change
Looks like a billiard ball (solid, uniform, sphere)

Question 2

J.J Thompson

Answer 2

Thought atoms might be made up of smaller particles
Proved that negatively charged electrons were part of an atom
Viewed atom as a “raisin bun”

Question 3

Rutherford

Answer 3

positively charged protons
neutral neutrons exist in the nucleus
a volume of empty space surround the nucleus
solar system

Question 4

Bohr

Answer 4

electrons are associated with certain levels
Bohr’s Diagram (valence shells)

Question 5

Robert Hooke

Answer 5

1665
noticed structured while viewing slices of cork, and named them cells

Question 6

Anton Van Leeuwenhoek

Answer 6

observes living things under a microscope (animalcules)

Question 7

Schwann/Schleiden

Answer 7

1838
Proposed that animal and plant tissues are made out of cells.