Chem Exam 1

Front 1

solution

Back 1

homogeneous mixture

c

Front 2

solid

Back 2

has definite shape and volume

d

Front 3

compound

Back 3

can be broken down by chemical changes

e

Front 4

physical property

Back 4

can be determined without altering the identity

a

Front 5

element

Back 5

cannot be broken down by chemical or physical means

b

Front 6

liquid

Back 6

has no definite shape, has definite volume

b

Front 7

pure substance

Back 7

has constant composition:consists of elements and compounds

a

Front 8

gas

Back 8

has no define shape or volume

e

Front 9

matter

Back 9

has mass and occupies space

d

Front 10

chemical property

Back 10

can be determined only by altering the identity

c

Front 11

exothermic

Back 11

energy heat released

e

Front 12

sublimation

Back 12

solid---->gas

c

Front 13

e-mc^2

Back 13

eisntein's equation

d

Front 14

endothermic

Back 14

heat energy is absorbed

b

Front 15

deposition

Back 15

gas--->solid

a

Front 16

condensation

Back 16

gas-->liquid

a

Front 17

vaporization

Back 17

liquid--->gas

c

Front 18

potential energy

Back 18

stored energy

d

Front 19

temperature

Back 19

man-made scale

e

Front 20

kinetic energy

Back 20

energy in motion

b

Front 21

atom

Back 21

smallest part of an elemtent retaining alll properties of the element.

c

Front 22

proton

Back 22

charge= +1, exists inside the nucleus

d

Front 23

mass number

Back 23

number of protons + neutrons

e

Front 24

atmic number

Back 24

number of protins in the nuclues

b

Front 25

neutron

Back 25

charge= 0, found inside the nucleus

a

Front 26

electron

Back 26

charge = -1, found outside the nucleus

b

Front 27

nucleus

Back 27

very small, positively charged, contains most of the mass of the atom

e

Front 28

isotope

Back 28

same # of protons, different # of neutrons

d

Front 29

amu

Back 29

atomic mass unit

c

Front 30

alpha, beta, gamma

Back 30

types of radioactivity

a

Front 31

nuclear binding enery

Back 31

mass defect is converted into this

d

Front 32

wavelength

Back 32

peak to peak distance

e

Front 33

frequency

Back 33

# of waves passing a point each second

a

Front 34

c

Back 34

speed of em waves in a vacuum

b

Front 35

quanta

Back 35

particles of energy

c

Front 36

mass defect

Back 36

mass lost when nucleons combine

e

Front 37

dispersion

Back 37

different wavelengths end different

a

Front 38

amplitude

Back 38

height of a wave

b

Front 39

blackbody radiation

Back 39

energy emitted by hot objects

d

Front 40

strong nuclear force

Back 40

attractive force between nuceons

c

Front 41

maxwell

Back 41

theory that light has an em wave

d

Front 42

planck

Back 42

propposed the quanta idea

b

Front 43

rutherford

Back 43

developed the nuclear model

a

Front 44

newton

Back 44

first particle theory of light

c

Front 45

einstein

Back 45

explained brownian motion

c

Front 46

chadwick

Back 46

discovered neutron

b

Front 47

hertz

Back 47

experimentally proved maxwell's theory

a

Front 48

dalton

Back 48

first atomic theory

d

Front 49

becquerel

Back 49

accidentally discovered radioactivity

a

Front 50

bohr

Back 50

principle of complementarity

b

Front 51

jj thomson

Back 51

discovered the electron

c

Front 52

huygens- hooke

Back 52

first wave theory of light

d

Front 53

which is not a characteristic of pure substances?

Back 53

c) consists only of compounds

Front 54

which two elements are liquids at room T?

Back 54

a) mercury and bromine

Front 55

the total amount of matter in the universe is constant.
this statement of the law of

Back 55

a)conservation of matter

Front 56

the convertion of one form of energy into another

Back 56

a)cannot occur

Front 57

"lost" energy during visible energy conversions will appear as

Back 57

a) heat

Front 58

according to e=mc^2

Back 58

a)a small amount of matter converts into a large amount of energy

Front 59

which changes in state are exothermic?

Back 59

c)condensation, deposition

Front 60

the idea that matter is discrete was first proposed by

Back 60

a) democritus

Front 61

which is not part of the dalton atomic theory?

Back 61

a) matter is composed of destructive atoms

Front 62

which order of atomic models is correct from earliest to latest

Back 62

C) plum pudding, nuclear, planetary

Front 63

which cannot be credited to rutherford?

Back 63

D) quanta idea

Front 64

consider aluminum, z=13, and a=27, determine the #p, #n, & # e-

Back 64

d) 13,14,13

Front 65

the amu is based on the mass of

Back 65

c) once c-12 atom=12 amu

Front 66

which is not true of the strong nuclear force

Back 66

d) acts only between protons

Front 67

for an em wave as the frequency decreases the energy

Back 67

b) decreases

Front 68

which spectrum has bright lines on a dark background

Back 68

d) emission

Front 69

early attempts to explain blackbody radiation treated energy as

Back 69

b)continuous

Front 70

which scientist finally explained blackbody radiation

Back 70

a) planck

Front 71

in the nuclear model positive charge is

Back 71

b) found in the nucleus

Front 72

which is not true of the gold foil experiment?

Back 72

a) involved firing gamma rays at a gold foil

Front 73

what was the main failure of the nuclear model?

Back 73

a) atom was unstable

Front 74

which is true of the photoelectric effect?

Back 74

c) basis for the electric eye

Front 75

is light showing its wave or particle side in the photoelectric effect?

Back 75

c) particle only

Front 76

which is true of isotopes?

Back 76

d) there are no man-made isotopes

Front 77

which property of light explains the blue sky?

Back 77

d) dispersion