Test 1

Question 0

Democritus

Answer 0

Atomos

Question 1

Chemistry

Answer 1

Study of composition of matter and the changes it undergoes

Question 2

Aristotle

Answer 2

Continuous view

Question 3

Scientific method

Answer 3

1700s

Observation, hypothesis, experimentation, analyzation

Question 4

A. Lavoisier

Answer 4

Law of conservation of matter

Question 5

Law of conservation of matter(mass)

Answer 5

In a chemical reaction matter cannot be created nor destroyed. Only change forms

Question 6

Law

Answer 6

A brief statement or mathematical equation that summarizes a large amount of results and predicts future results

Question 7

John Dalton

Answer 7

Atomic theory

Question 8

Theory

Answer 8

Very detailed explanation of what is happening

Question 9

Sir. F. bacon

Answer 9

Science is the answer. It will solve our problems

Question 10

Rachel Carson

Answer 10

Wrote silent spring. Led to green chemistry

Question 11

Green chemistry

Answer 11

Reduce waste

Safer solvents

Question 12

Physical properties/changes

Answer 12

Characteristics displayed without change in composition. Color, phys state, odor, etc.
dissolve. It disperses doesn’t change.

Question 13

Chemical properties/changes

Answer 13

Rust, fire, inert, chemical reactions

Question 14

Kinetic energy in states of matter

Answer 14

Solid lowest
Liquid middle
Gas highest

Question 15

Solid

Answer 15

Particles packed closely together in fixed positions. Incompressible.
Independent shape and volume

Question 16

Liquid

Answer 16

Particles in close contact but freely nice past one another

Independent volume

Question 17

Gas

Answer 17

Particles separate from one another. Large gaps between particles. Compressible
Takes shape and volume of container

Question 18

Adding sig fig

Answer 18

Answer may only have as many decimal places as the original value with the fewest

Question 19

Multiplying sig fig

Answer 19

Answer may only have as many sig figs as original value with the fewest

Question 20

Mixtures

Answer 20

Contain 2 or more pure substances not chemically combined. Fairly easy to seperate

Question 21

Pure substances

Answer 21

Composed of one type of atom or molecule.

Question 22

Heterogeneous mixture

Answer 22

Uneven distribution of components. Oil &water

Question 23

Homogenous

Answer 23

Even distribution. Solutions

Milk; soda

Question 24

Element

Answer 24

Composed of one type of atom

Question 25

Atom

Answer 25

Smallest part of an element that still has properties of that element

Question 26

Compound

Answer 26

Composed of two or more types if atoms

Question 27

Molecule

Answer 27

2 or more atoms chemically bonded together.

Question 28

Au

Answer 28

Atomic element

Question 29

O (subscript)2

Answer 29

Molecular element

Question 30

H2O

Answer 30

Molecular compound

Question 31

Energy

Answer 31

Ability to do work or cause change

Question 32

Potential energy

Answer 32

Stored E. E of position. Energy in chem bonds

Question 33

Kinetic energy

Answer 33

E of motion. Thermal

Question 34

Law of conservation of energy

Answer 34

Energy is neither created it destroyed

Question 35

1 cal = J

Answer 35

4.18

Question 36

Calorie

Answer 36

energy required to raise 1g of water 1C

Question 37

Boiling freezing absolute zero

Answer 37

Boiling 212 F 100 C 373K Freezing 32F. 0C. 273K Abs Zero -460 F. -273C 0K

Question 38

J. Proust

Answer 38

Law of definite proportions

Question 39

Law of definite proportions

Answer 39

Any given compound is always composed of the same elements in the same mass ratio

Question 40

J. Dalton

Answer 40

Law of multiple proportions And Atomic theory

Question 41

Law of mult proportions

Answer 41

Elements may combine in a variety or ratios but a different compound will result

Question 42

Mendeleev

Answer 42

Periodic law

Question 43

Periodic law

Answer 43

When we arrange elements according to their atomic mass their proportions occur periodically

Question 44

WM crookes

Answer 44

Cathode ray tube

Question 45

Jj Thomson

Answer 45

Plum pudding model | Discovered electron

Question 46

Plum pudding model

Answer 46

Atom composed if positively charged stuff with negatively charged particles randomly embedded

Question 47

E. Rutherford

Answer 47

Nuclear model

Question 48

Nuclear model

Answer 48

``` Atom is mostly empty space. W/dense central nucleus. Inside are positivity charged particles (protons). Electrons outside nucleus Stadium peas(elephant) fly ```

Question 49

Chadwick

Answer 49

Discovered neutron. Inside nucleus with protons. No charge

Question 50

Atomic mass number

Answer 50

Sum of protons plus neutrons

Question 51

Atomic number

Answer 51

Number of protons

Question 52

Isotope

Answer 52

Same atomic number | Diff atomic mass

Question 53

Bohr

Answer 53

Planetary model | Energy levels 2nsquared

Question 54

Valence electrons

Answer 54

Electrons in hugest n level | Most reactive

Question 55

Group 1A

Answer 55

Alkali metals

Question 56

Group 2A

Answer 56

Alkaline earth metals

Question 57

Group 7A

Answer 57

Halogens

Question 58

Group 8A

Answer 58

Noble gases

Question 59

Metals on ptable

Answer 59

Left of zig

Question 60

Non metals on ptable

Answer 60

Right of zig

Question 61

Metalloid

Answer 61

On zig except Al

Question 62

Lewis dot structure

Answer 62

Represents valence electrons