Lesson 2: The Atom + Atomic History

Question 1

True or False: Elements are made up of small, divisible particles called atoms.

Answer 1

False, indivisible

Question 2

True or False: Elements are made up of small, indivisible particles called atoms.

Answer 2

True

Question 3

True or False: In any given element, the atoms’ mass and properties may differ.

Answer 3

False, they are all the same

Question 4

True or False: In any given element, the atoms’ mass and other properties are all the same.

Answer 4

True

Question 5

True or False: Hydrogen atoms are the same with oxygen atoms.

Answer 5

False, because their atoms are made up of two different properties

Question 6

What do we call a composition of atoms with more than one element?

Answer 6

Compound

Question 7

Who created the Law of Definite Proportions?

Answer 7

Joseph Proust

Question 8

True or False: It was John Joseph Thomson who proposed the Law of Definite Proportions.

Answer 8

False, Joseph Proust

Question 9

Law of Definite Proportions

Answer 9

When elements form a compound, they combine in similar proportions by mass, regardless of the size sample.

Question 10

True or False: When elements form a compound, they combine in distinct proportions by mass.

Answer 10

False, similar proportions

Question 11

True or False: Size sample is a crucial factor in forming compounds, according to the Law of Definite Proportions.

Answer 11

False, compounds form regardless of such

Question 12

Law of Multiple Proportions

Answer 12

If two elements combine to form more than one compound, the weights of one combined with the other’s fixed weight come in small whole-numbered ratios.

Question 13

Law of Conservation of Mass

Answer 13

Matter is neither created nor destroyed during chemical reactions.

Question 14

True or False: Matter can be destroyed during chemical reactions.

Answer 14

False

Question 15

[Atomic History] 450 BC

Answer 15

Living things consisted of the four primal elements: Earth, Air, Fire and Water

Question 16

[Atomic History] Important figure during 450 BC

Answer 16

Empedocles

Question 17

[Atomic History] 400 BC

Answer 17

• First discovered the atom
• Matter is made up of small particles called atoms, which cannot be divided into smaller units.

Question 18

[Atomic History] Important figure in 400 BC

Answer 18

Democritus

Question 19

In Democritus’ model of the atom, it is a full space.

Answer 19

False, it is an empty space.

Question 20

Atomos comes from the Latin language.

Answer 20

False, Greek language

Question 21

Atomos directly translates to?

Answer 21

Indestructible

Question 22

True or False: Atoms can be divided into smaller units.

Answer 22

False, they are indivisible

Question 23

Who proposed the Law of Multiple Proportions?

Answer 23

John Dalton

Question 24

[Atomic History] 1808

Answer 24

Formulation of the atomic theory, AKA bowling ball model

Question 25

[Atomic History] Important figure in 1808

Answer 25

John Dalton

Question 26

[Atomic History] 1869

Answer 26

Arrangement of the early known elements in a periodic table based on their atomic numbers and mass

Question 27

[Atomic History] Important figure in 1869

Answer 27

Dmitry Mendeleev

Question 28

[Atomic History] 1890

Answer 28

Discovery of radioactivity and how it causes atoms to break down

Question 29

[Atomic History] Important figures in 1890

Answer 29

Antoine Becquerel and Marie Curie

Question 30

[Atomic History] 1895

Answer 30

Discovery of X-rays

Question 31

[Atomic History] Important figure in 1895

Answer 31

Wilhelm Rontgen

Question 32

What did the very first x-ray image show?

Answer 32

Wilhelm Rontgen’s wife’s hand wearing her ring

Question 33

[Atomic History] 1897 and 1904

Answer 33

- Discovery of electrons - Introduced the plum pudding model of an atom

Question 34

[Atomic History] Important figure in 1897 and 1904

Answer 34

John Joseph (J.J.) Thomson

Question 35

[Atomic History] 1908-1917

Answer 35

Discovered the charge of an electron: -1.6022 x 10^-19 C

Question 36

[Atomic History] Important figure in 1908-1917

Answer 36

Robert Millikan

Question 37

Who discovered the charge of electrons?

Answer 37

Robert Millikan

Question 38

[Atomic History] 1910-1911, 1919

Answer 38

- Discovery of protons - Introduced the planetary model of an atom - Atoms are mostly made up of empty space

Question 39

True or False: Atoms are mostly made up of empty space.

Answer 39

True

Question 40

[Atomic History] Important figure in 1910-1911, 1919

Answer 40

Ernest Rutherford

Question 41

[Atomic History] 1913

Answer 41

- Introduced the quantum mechanical model - Electrons move around in orbits around the nucleus

Question 42

[Atomic History] Important figure in 1913

Answer 42

Niels Bohr

Question 43

[Atomic History] 1932

Answer 43

Discovery of neutrons

Question 44

[Atomic History] Important figure in 1932

Answer 44

James Chadwick

Question 45

Planetary Model of an Atom

Answer 45

Ernest Rutherford

Question 46

Plum Pudding Model

Answer 46

J.J. Thomson

Question 47

Charge of electrons

Answer 47

Robert Millikan

Question 48

Four primal elements

Answer 48

Empedocles

Question 49

Discovered x-rays

Answer 49

Wilhelm Rontgen

Question 50

Discovered radioactivity

Answer 50

Antoine Becquerel and Marie Curie

Question 51

Made earliest version of the periodic table

Answer 51

Dmitry Mendeleev

Question 52

Atomic Theory / Bowling Ball Model

Answer 52

John Dalton

Question 53

Discovered atoms

Answer 53

Democritus

Question 54

Quantum Mechanical Model

Answer 54

Niels Bohr

Question 55

Discovered protons

Answer 55

Ernest Rutherford

Question 56

Discovered electrons

Answer 56

J.J. Thomson

Question 57

Discovered neutrons

Answer 57

James Chadwick

Question 58

Antoine Becquerel and Marie Curie

Answer 58

Radioactivity, causes atoms to break down

Question 59

Empedocles

Answer 59

Four primal elements

Question 60

Wilhelm Rontgen

Answer 60

discovered x-rays

Question 61

Democritus

Answer 61

discovered the atom

Question 62

Robert Millikan

Answer 62

Discovered the charge of electrons (-1.6022x10^-19 C)

Question 63

Dmitry Mendeleev

Answer 63

Earliest version of the periodic table

Question 64

Niels Bohr

Answer 64

Quantum mechanical model

Question 65

James Chadwick

Answer 65

Discovered neutrons

Question 66

Ernest Rutherford

Answer 66

Planetary Model of an Atom, discovered protons

Question 67

J.J. Thomson

Answer 67

Plum Pudding Model, discovered electrons

Question 68

John Dalton

Answer 68

Proposed the Law of Multiple Proportions, Bowling Ball Model / Atomic Theory