Chem Lab Quiz 1

Front 1

anything that has mass and occupies space

Back 1

matter

Front 2

characteristic that helps to distinguish a type of matter

Back 2

property

Front 3

how many basic elements?

Back 3

100

Front 4

building blocks of matter

Back 4

atoms

Front 5

properties of matter are dependent on (2 things)

Back 5

1. kinds of atoms (composition
2. arrangement of atoms (structure)

Front 6

atoms combine to form

Back 6

molecules

Front 7

gas, liquid, solid

Back 7

states of matter

Front 8

has no fixed volume or shape, compressible

Back 8

gas aka vapor

Front 9

has distinct volume no distinct shape, cannot be compressed

Back 9

liquid

Front 10

definite shape and volume, cannot be compressed

Back 10

solid

Front 11

describe gas molecules

Back 11

far apart and move at high speeds, constantly colliding

Front 12

describe liquid molecules

Back 12

packed closely together but still move at hi-speeds and they can slide over each other

Front 13

describe solid molecules

Back 13

held in definite arrangements in which molecules can move slightly

Front 14

matter that does not vary in composition from sample to sample

Back 14

pure substance aka substance, ex. H20 and NaCl

Front 15

___&____ are both pure substances

Back 15

elements and compounds

Front 16

cannot be decomposed into a simple substance, made up of one type of atom

Back 16

element

Front 17

substance composed of 2 or mor elements

Back 17

compounds

Front 18

combinations of 2 or more substances with its own chemical identity

Back 18

mixture

Front 19

elements known

Back 19

117

Front 20

all pure substances are each made up of the same elements

Back 20

law of constant composition/definite proportions

Front 21

substances that make up a mixture

Back 21

components

Front 22

mixture that may vary in appearance or texture such as wood and rocks

Back 22

heterogenous mixture

Front 23

mixtures that are uniform throughout ex. air

Back 23

homogenous mixtures aka solutions

Front 24

property that can be observed without changing identity or composition ex. color, boiling point, hardness

Back 24

physical

Front 25

property that describes the way a substance may change, or react, to form other substances

Back 25

chemical

Front 26

do not depend on sample amount ex. temp, density, melting point

Back 26

intensive property

Front 27

depends on amount of substance ex. mass, volume

Back 27

extensive property

Front 28

same substance remains before and after reaction ex. change of state

Back 28

physical change

Front 29

substance transferred into a different substance

Back 29

chemical change

Front 30

3 methods of separating mixtures into components

Back 30

filtration, distillation, chromatography

Front 31

substance passes through selective barrier

Back 31

filtration

Front 32

process that depends on different substances abilities to form gas

Back 32

distillation

Front 33

separation of ink

Back 33

chromatography

Front 34

SI Units:
mass, length, time, temp, amount of substance, electric current, luminous intensity

Back 34

kg, m, s, K, mol, Ampere (A), candela (cd)

Front 35

K=

Back 35

C plus 273.15

Front 36

C =

Back 36

5/9(F-32)

Front 37

property of matter used to characterize amount of mass in a unit of volume

Back 37

density

Front 38

2 types of numbers in science

Back 38

exact and inexact

Front 39

measurements are always what kind of numbers?

Back 39

inexact

Front 40

measure of how closely individuals measurements are with each other

Back 40

precision

Front 41

how closely individual measures agree with the true value

Back 41

accuracy

Front 42

precision of measurements expressed in terms of variation from the average

Back 42

standrad deviation

Front 43

sigfigs in add/sub

Back 43

measurement with fewest decimal places

Front 44

sigfigs in mult/div

Back 44

measurement with fewest sigfigs

Front 45

in any given compound, numbers and types of atoms are constant

Back 45

law of constant composition

Front 46

mass of substance is constant before and after chemical reaction

Back 46

law of conservation of mass

Front 47

elements combine to form compound sin small whole number amounts

Back 47

law of multiple proportions

Front 48

atoms are composed of

Back 48

subatomic particles

Front 49

cathode ray (radiation) gives rise to

Back 49

electrons

Front 50

electron mass

Back 50

9.1 x 10^-28

Front 51

how closely individual measures agree with the true value

Back 51

accuracy

Front 52

precision of measurements expressed in terms of variation from the average

Back 52

standrad deviation

Front 53

sigfigs in add/sub

Back 53

measurement with fewest decimal places

Front 54

sigfigs in mult/div

Back 54

measurement with fewest sigfigs

Front 55

in any given compound, numbers and types of atoms are constant

Back 55

law of constant composition

Front 56

mass of substance is constant before and after chemical reaction

Back 56

law of conservation of mass

Front 57

elements combine to form compound sin small whole number amounts

Back 57

law of multiple proportions

Front 58

atoms are composed of

Back 58

subatomic particles

Front 59

cathode ray (radiation) gives rise to

Back 59

electrons

Front 60

electron mass

Back 60

9.1 x 10^-28

Front 61

spontaneous emission of radiation

Back 61

radioactivity

Front 62

3 types of radiation

Back 62

alpha, beta, gamma

Front 63

describe alpha and beta radiation

Back 63

alpha and beta radiation are bent by electrical fields, yet gamma is unaffected. alpha has a postive charge 2 plus while beta are negative 2

Front 64

gamma radiation

Back 64

relates to x-rays

Front 65

why don't atoms have an electrical charge?

Back 65

every atom has the same number of protons and electrons

Front 66

1.66504 x 10^-24 g =

Back 66

1amu

Front 67

number of protons in nucleus

Back 67

atomic number

Front 68

same atomic number but different mass number

Back 68

isotopes

Front 69

in periodic table how elements arranged

Back 69

in increasing atomic number

Front 70

hotizontal rows of p.t

Back 70

period

Front 71

vertical columns in p.t

Back 71

groups

Front 72

all elements on left side and middle of table are

Back 72

metallic elements

Front 73

luster, high conductivity, all are solid at room temperatures except Hg

Back 73

metallic elements

Front 74

elements that lie along the the line that separates metals and nonmetals

Back 74

metalloids

Front 75

molecues that exist as 2 atoms

Back 75

diatomic molecules

Front 76

the 8 diatomic molecules

Back 76

H, O, N, F, Cl, Br, I, At

Front 77

vertical columns in p.t

Back 77

groups

Front 78

compounds composed of molecules that contain more than one atom

Back 78

molecular compounds

Front 79

nucleus of atom is

Back 79

unchanged

Front 80

all elements on left side and middle of table are

Back 80

metallic elements

Front 81

once an atom gains/loses electrons it becomes an

Back 81

ion

Front 82

luster, high conductivity, all are solid at room temperatures except Hg

Back 82

metallic elements

Front 83

positively charged ion

Back 83

cation

Front 84

elements that lie along the the line that separates metals and nonmetals

Back 84

metalloids

Front 85

molecues that exist as 2 atoms

Back 85

diatomic molecules

Front 86

the 8 diatomic molecules

Back 86

H, O, N, F, Cl, Br, I, At

Front 87

compounds composed of molecules that contain more than one atom

Back 87

molecular compounds

Front 88

nucleus of atom is

Back 88

unchanged

Front 89

once an atom gains/loses electrons it becomes an

Back 89

ion

Front 90

positively charged ion

Back 90

cation

Front 91

positively charged ion

Back 91

cation

Front 92

negatively charged ion

Back 92

anion

Front 93

compound that contains positive and negatively charged ions, metal + nonmetal

Back 93

ionic compounds

Front 94

compounds composed of molecules that contain more than 1 type of atom; nonmetals only

Back 94

molecular compounds