Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

chemistry > atomic scientists theory timeline > Flashcards

atomic scientists theory timeline Flashcards

You may prefer our related Brainscape-certified flashcards:
Periodic Table flashcards Chemistry 101 flashcards AP® Chemistry flashcards Organic Chemistry 101 flashcards
1
Q

what are the 8 names of the scientists in timeline order?

A
  1. democritus
  2. aristotle
  3. dalton
  4. thompson
  5. rutherford
  6. bohr
  7. heisenberg & schrodinger
  8. modern cloud technology
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what was the time period of democritus?

A

400 BC

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what did democritus develop?

A

developed first atomic theory

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what does “atomos” mean?

A

“not to be cut”

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what were the 7 things democritus believe about atoms ?

A

believed that atoms were…
1. solid
2. uniform
3. hard
4. made of the same material
5. different shapes & sizes
6. smallest piece of matter
7. indivisible & indestructible

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what shape did democritus say that atoms were in?

A

spherical shape

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what was democritus’ analogy?

A

legos

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what was the time period of aristotle?

A

300 B.C. to Early 1800s

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what 4 things did aristotle say that all matter was made of?

A
  1. fire
  2. water
  3. earth
  4. air
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what 4 properties did aristotle say that matter had?

A
  1. hot
  2. cold
  3. dry
  4. wet
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

why was aristotle’s ideas so popular?

A

aristotle had a lot of influence over people so his ideas were easily welcomed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what is the death of chemistry?

A

when there was no new discoveries made and people believed whatever aristotle said

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what was aristotle’s analogy?

A

“death to the field of chemistry for 2000 years!”

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what was the time period for dalton?

A

1803

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what did dalton do since the death of chemistry?

A

made the first atomic theory since the death of chemistry

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what was dalton’s theory?

A

all atoms of the same element are identical and atoms of different elements are different

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

what did dalton say about matter?

A

all matter is made up of atoms

18
Q

what did dalton say about atoms?

A

atoms are too small to be seen

19
Q

what 2 things did dalton find out?

A
  1. we might have different elements
  2. chemical reactions = rearrangement of atoms
20
Q

what was dalton’s analogy?

A

billiard ball

21
Q

what was thompson’s time period?

A

1897

22
Q

what was thompson’s famous model called?

A

“plum pudding”

23
Q

what are the 3 things that thompson discovered?

A
  1. atoms might have subatomic/smaller particles
  2. electrons have a negative charge
  3. protons have a positive charge
24
Q

what is thompson’s analogy?

A

chocolate chips in a cookie

25
Q

what was the time period for rutherford?

A

1908

26
Q

what 2 things did rutherford discover?

A
  1. discovered the nucleus
  2. electrons are scattered outside the nucleus at a distance
27
Q

what is rutherford’s theory?

A

atoms have small, dense, positively-charged center called the nucleus

28
Q

how did rutherford disprove thompson’s pudding model?

A

by using positively-charged particles fired at gold foil, he proved atoms are not pudding filled with positively-charged material

29
Q

what was rutherford’s analogy?

A

cherry with a pit

30
Q

what was the time period of bohr?

A

1913

31
Q

what did bohr’s model show?

A

showed what an atom is made of

32
Q

what was bohr’s theory?

A

electrons move in definite orbits around the nucleus, like planets around the sun

33
Q

what 2 things did bohr find out about electrons?

A
  1. travel fixed around the nucleus
  2. energy levels increased for electrons when farther away from nucleus
34
Q

what was bohr’s analogy?

A

solar system

35
Q

what was the time period for heisenberg & schrodinger?

A

1920s

36
Q

what 2 things was heisenberg & schrodinger known for?

A
  1. equation
  2. uncertainty principle
37
Q

what is the uncertainty principle?

A

cannot know speed and position of a particle at the same time

38
Q

what was the time period for the modern cloud theory?

A

20th century

39
Q

what are the 3 main scientists in the modern cloud theory?

A
  1. heisenberg
  2. schrodinger
  3. einstein
40
Q

what did the modern cloud theory uncover about electrons?

A

electrons do not orbit the nucleus in planet-like orbits, they move at high speeds in an electron cloud around the nucleus

41
Q

which scientist’s theory did the modern cloud theory disprove?

A

bohr’s theory about how electrons move at a fixed rate/position around the nucleus

42
Q

what is the analogy for the modern cloud theory?

A

cotton ball

chemistry (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions