Unit One

Question 1

What makes a good measurement

Answer 1

Uncertainty
Add units
Numbers themselves

Question 2

When is data accurate

Answer 2

“Right”

Question 3

When is data precise

Answer 3

“Consistent”

Question 4

What is goal when getting data

Answer 4

First precision then accuracy

Question 5

What are the hottest and coldest parts of a flame

Answer 5

Hottest on top of inner cone

Coldest very bottom

Question 6

What makes a good experiment

Answer 6

Controlled variable
Independent and dependent variables
Repeatable/detailed

Question 7

How do we express uncertainty

Answer 7

Significant figures and calculating extra decimal

Question 8

All non zero numbers are or aren’t sig figs

Answer 8

Are significant

Question 9

Zeros sandwiched in between sig gigs are or aren’t significant

Answer 9

Significant

Question 10

Leading zeros before sig figs are or aren’t sig figs

Answer 10

Are not sig figs

Question 11

Trailing zeros with or without decimal, sig or no?

Answer 11

With decimal yes sig

No decimal not sig

Question 12

Counting number sig or no

Answer 12

Have infinite number of sig figs, like 20 people

Question 13

To solve conversion use

Answer 13

Dimensional analysis

Question 14

Conversion factor

Answer 14

Ratio or fraction relating or connecting two different units

Question 15

Conversion unit problem pieces

Answer 15

Unknown amount and units
Initial amount and units
Conversion factor

Question 16

Father of modern chemistry

Answer 16

Antoine Lavoisier

Question 17

Law of conservation of mass

Answer 17

Lavoisiers conclusions

Mass can not be created or destroyed

Question 18

Matter

Answer 18

Anything with mass and volume

Question 19

Substance

Answer 19

Form of matter with uniform and unchanging composition

Question 20

Filtration

Answer 20

Seperate a solids from liquids by using a porous barrier

Question 21

Distillation

Answer 21

Separated substances on the basis of the boiling points of the substances

Question 22

Crystallization

Answer 22

Separates by formation of solid, pure particles from a solution

Question 23

Chromatography

Answer 23

Seperate a substances based on their movement through a special paper

Question 24

Horizontal rows on periodic table

Answer 24

Periods

Question 25

Vertical rows on periodic table

Answer 25

Group or families

Question 26

State of matter

Answer 26

Solid, liquid, gas

Question 27

Physical property

Answer 27

Characteristic observed or measured without changing sample composition.

Question 28

Density, color, odor, hardness, melting point are all examples of what

Answer 28

Physical properties

Question 29

Physical properties have two types that are?

Answer 29

Extensive properties and intensive properties

Question 30

What are extensive properties

Answer 30

Dependent on the amount of substance present | Ex: mass length volume

Question 31

What are intensive properties

Answer 31

Independent on the amount of substance present, ex density

Question 32

Chemical properties

Answer 32

The ability of a substance to combine with or change into one or more other substances, or in ability to

Question 33

Iron forming rust when combine with oxygen is what

Answer 33

A chemical property

Question 34

Why is it important to state specific conditions such as temp and pressure under which observations are made?

Answer 34

Because both physical and chemical properties depend on these conditions

Question 35

Physical change

Answer 35

Alters a substance without changing its composition

Question 36

Foil going from smooth sheet to crumpled ball is

Answer 36

A physical change

Question 37

Phase change

Answer 37

Transition of matter from one state to another

Question 38

Chemical change

Answer 38

Process in which One or more substances changing into new substance with new properties and composition

Question 39

Matter than can't be physically seperated

Answer 39

Pure substance

Question 40

Compound

Answer 40

A chemical combination of two or more different elements

Question 41

Element

Answer 41

Substance that cannot be seperate D into simpler substances

Question 42

Mixture

Answer 42

Matter that can be physically separated, combination of two or more pure substances

Question 43

Uniform mixture

Answer 43

Homogenous mixture

Question 44

Not uniform mixture

Answer 44

Heterogenous mixture

Question 45

Graphite: Pepper: Sugar: Soda:

Answer 45

Element Hetero mix Compound Solution

Question 46

Law of definite composition

Answer 46

A given compound always contains the same fixed ratio of elements

Question 47

Law of multiple proportions

Answer 47

Elements can combine in different ratios to form different compounds

Question 48

Solution

Answer 48

Homo mix Particles don't settle No Tyndall effect

Question 49

``` Extensive or intensive identify Boiling point: Volume: Mass: Density: Conductivity: ```

Answer 49

``` Intensive Extensive Extensive Intensive Intensive ```

Question 50

Percent composition

Answer 50

Percentage by mass of each element in a compound %comp.= mass of element/total mass X100

Question 51

If matter can't be separated physically it is a

Answer 51

Pure substance

Question 52

Ideal gas

Answer 52

No volume No velocity when collide (elastic collisions) Random straight motion

Question 53

Real gas

Answer 53

Own volume attract each other

Question 54

Gas behavior is most ideal at

Answer 54

Low pressures | High temps

Question 55

Dividing numbers with sig figs,

Answer 55

Smallest number

Question 56

Using density find volume of a certain grams

Answer 56

Divide the grams by the density

Question 57

Calculating percent error

Answer 57

Difference/correct

Question 58

Rutherfords experiment indicated that

Answer 58

Positive charges are concentrated in a very small core at the atoms center

Question 59

When given electron configuration how do you find the element

Answer 59

Count superscripted to determine electrons

Question 60

How to find valence electron

Answer 60

Biggest number in electron configuration

Question 61

How to find unpaired electrons

Answer 61

Draw last sublevel

Question 62

What have the same valence electrons

Answer 62

Down a group

Question 63

If an atom gains electrons what happens to radius

Answer 63

Radius increases

Question 64

Higher pressure means what for molecules

Answer 64

More molecules

Question 65

At constant pressure the volume of a mole of any ideal gas varies

Answer 65

Directly with kelvin temperature

Question 66

Not an assumption of matter made by kinetic molecular theory

Answer 66

When particles collide their total energy decreases