Lesson 1

Question 1

_________- closeness of measurements

Answer 1

ACCURACY

Question 2

_________- closeness of set measurements

Answer 2

PRECISION

Question 3

_________- commonly accepted value

Answer 3

PERCENTAGE ERROR

Question 4

_________- does not involve a change.

Answer 4

PHYSICAL

Question 5

_________- converted into different substances

Answer 5

CHEMICAL

Question 6

__________- observed with the senses

Answer 6

PHYSICAL PROPERTY

Question 7

_________- how a substance reacts with something

Answer 7

CHEMICAL PROPERTY

Question 8

_________- 3 starter of Matter

Answer 8

solid , Liquid, and Gas.

Question 9

_________- Particles packed very closely together

Answer 9

SOLID

Question 10

_________- Particles packed more loosely, but still together”

Answer 10

LIQUID

Question 11

_________- particles are “far apart”

Answer 11

Gas

Question 12

_________- Fixed composition

Answer 12

PURE SUBSTANCE

Question 13

_________- only one kind of atom

Answer 13

ELEMENT

Question 14

_________- chemically bonded

Answer 14

COMPOUND

Question 15

_________- can be classified as either a substance / mixture.

Answer 15

MATTER

Question 16

1st used term “atom” - _________ _____BC

Answer 16

Demoentus (400BC)

Question 17

_________- A major ideas, Model of an Atom
It is often referred to as the “billiard ball” model. He defined an atom to be a ball-like structure, as the concepts of atomic nucleus and electrons were unknown at the time.

Answer 17

Dalton’s model (1803)

Question 18

The _________ model postulates that “electrons orbit the nucleus at fixed energy levels.”

Answer 18

Bohr’s model

Question 18

_________- Discover Protons (1886)

Answer 18

Eugene Goldstein

Question 18

_________- Discover electron. He called his atom the plum pudding model.

Answer 18

Thomson’s model (1897) -

Question 19

_________- “gold foil” experiment.

Answer 19

Rutherford’s model (1911)

Question 20

_________- discovers charge of Mass of an electron (1919)

Answer 20

Robert Millikan

Question 21

_________- discovered Neutrons (1932)

Answer 21

Sir James Chadwick

Question 22

_________- Particle-wave duality. He introduced the idea that particles, such as electrons, could be described not only as particles but also as waves.

Answer 22

Louis de Broglie

Question 23

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Question 23

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Question 24

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Question 25

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Question 25

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Question 26

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Question 27

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Question 28

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Question 29

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Question 30

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Question 31

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Question 32

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Question 33

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Question 33

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Question 34

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Question 35

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Question 36

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Question 37

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Question 38

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Question 39

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Question 40

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Question 41

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Question 42

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Question 43

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Question 44

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Question 45

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Question 46

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Question 47

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Question 48

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