9-24-15

Question 1

believed there was a limit on how small matter could be divided

Answer 1

democritus

Question 2

said there was no limit to how many times matter could be divided

Answer 2

aristotle

Question 3

believed in the four elements

Answer 3

aristotle

Question 4

indivisible particles

Answer 4

Democritus

Question 5

“atomos”

Answer 5

Democritus

Question 6

solid spheres

Answer 6

dalton

Question 7

an atom is a tiny solid sphere

with a predictable mass for a given element

Answer 7

dalton

Question 8

ratio of elements combine is always the same

Answer 8

dalton

Question 9

agreed with four elements

Answer 9

Democritus

Question 10

2000 years ago (400 B.C)

Answer 10

Democritus

Question 11

400 B.C (2000 years ago)

Answer 11

Aristotle

Question 12

1803

Answer 12

Dalton

Question 13

jellybeans in a jar

Answer 13

Dalton

Question 14

all elements are made of atoms

Answer 14

Dalton

Question 15

compounds are multiple elements

Answer 15

Dalton

Question 16

solid sphere model

Answer 16

Dalton

Question 17

indivisible

no smaller than one atom

Answer 17

Dalton

Question 18

ratios are the same in compounds

Answer 18

Dalton

Question 19

masses of elements are the same

Answer 19

Dalton

Question 20

1897

Answer 20

Thomson

Question 21

seeds in a watermelon

Answer 21

Thomson

Question 22

discovered electron

Answer 22

Thomson

Question 23

electrons are negative

Answer 23

Thomson

Question 24

atoms = plum pudding

Answer 24

Thomson

Question 25

used electricity to attract and repel a beam of glowing gas

Answer 25

Thomson

Question 26

1899

Answer 26

Rutherford

Question 27

marble in a stadium

Answer 27

Rutherford

Question 28

discovered the nucleus

Answer 28

Rutherford

Question 29

gold foil experiment

Answer 29

Rutherford

Question 30

found a positive charge in the nucleus

Answer 30

Rutherford

Question 31

1913

Answer 31

Bohr

Question 32

solar system

Answer 32

Bohr

Question 33

organized electrons into predictable levels

Answer 33

Bohr

Question 34

electrons can move from one level to another (quantum leap)

Answer 34

Bohr

Question 35

electrons move down, light is released

Answer 35

Bohr

Question 36

1926

Answer 36

Modern Atomic Theory

Question 37

rolling dice

Answer 37

MAT

Question 38

electron cloud model

Answer 38

MAT

Question 39

can only predict where electrons can be found

Answer 39

MAT

Question 40

area where electron is likely to be found

Answer 40

orbital (MAT)