Chem Test #1

Front 1

John Dalton

Back 1

created the modern theory of the atom

Front 2

What did the greeks think about matter?

Back 2

that it could not be cut in half

Front 3

democrites thought...

Back 3

you couldn't subdivide atoms

Front 4

atom literally means

Back 4

uncutable

Front 5

Lavoiseier

Back 5

pioneered the balance and was the first to measure the amounf of materal ina rxn

Front 6

the balance was an example of

Back 6

technology enabling discovery

Front 7

Proust

Back 7

law of constant proportions;

Front 8

law of constant proportions

Back 8

atoms will always combine together in the same ratio

Front 9

dalton thought atoms had what 2 properties

Back 9

1. atoms of a given element have the same weight

2. atoms combine in fixed ratios

Front 10

avagadros #

Back 10

6.02 x 10^23.
mole conversion factor to write # of molecules to grams

Front 11

isotopes

Back 11

chemically identical but different weights

Front 12

alexander volta

Back 12

built the first battery

Front 13

Galvani thought...

Back 13

that animals had electricity in them. the frog twitched on the when dissected on a metal table

Front 14

who did volta question?

Back 14

galvani

Front 15

how is the battery built

Back 15

layer of metal, aq sltn, layer of metal, aq sltn

Front 16

the battery was the 1st

Back 16

to have current capabilities

Front 17

michael faraday

Back 17

took over for davy;
he did quantintative experiments and found how much charge atoms have

Front 18

Davy

Back 18

discovered the science of electrolyis

Front 19

torrielli invented

Back 19

the bramater

Front 20

the barameter was..

Back 20

an early cathode ray tube.

Front 21

how does a cathode ray tube work

Back 21

when the pressue inside a discharge tube is low enough, electrons fly across the whole length of the tube w/o hitting a gas atom. gives a green glow

Front 22

how was the xray discovered?

Back 22

rontgon was playing w/a cathode ray tube and florencent material near the tube started glowing. it continued to glow when there was cardboard inbetween. he captured the imagine on film.

Front 23

who discovered the xray?

Back 23

wilhem rontgon

Front 24

What did Henery Bequerrel go looking for?

Back 24

other penetraitng radition from phosphorescent materials

Front 25

what did henery Beqquerel do?

Back 25

discovered the radio activity of U. deemed the term radio active.

Front 26

what did mademe curie to?

Back 26

she discovered the radio activity of polonium and named radium.

Front 27

α-rays

Back 27

very weakly penetrating;
fast
He nuclei;
He 2+

Front 28

β-rays

Back 28

medium pentration;
fast electrons

Front 29

γ-rays

Back 29

highly peptrationg. High energy x-rays

Front 30

jj thomposn

Back 30

used the cathode ray to discover the 1st electron

Front 31

how was the 1st elctron discovered

Back 31

jj thomposon measured the charge/mass ration and showed that all cathode rays gave the sam e/m;
analytical balance

Front 32

what did milhan's oil drop experiment do?

Back 32

determined the mass by measuring the lectron charge. he proved that electron were lighter than H atoms

Front 33

How was the JJ Thompson electron model viewed?

Back 33

as the plumb pudding model. all the elctrons and protons in a dense mass in the center

Front 34

What was Rutherford's experiment:

Back 34

scattering α-rays from radium

Front 35

what did the α-rays from radium experiement show?

Back 35

it showed the 0.001% of the electron did not go thru the piece of gold foil. those scattered backwards. this showed that atoms have a center. no more plum pudding model

Front 36

How do you run a cathode ray tube backwards?

Back 36

look at the positive rays passing thru a hole in the cathode

Front 37

who ran the cathode ray backwards?

Back 37

JJ Thompson

Front 38

what was discovered when the cathode ray was ran backwards?

Back 38

JJ saw neon gas and atomic weight. he discovered itotopes of Li.

Front 39

What did Francis Astun discover?

Back 39

isotopes are whole numbers

Front 40

what did francis aston discover?

Back 40

isopes are whole numbers but he was wrong. that they all were not whole numbers. the missing mass is lost in nuclear binding energy.

Front 41

waht is the limitation of a radiowave?

Back 41

it cannot exceed the speed of light.

Front 42

Who discovered radio waves?

Back 42

Hertz

Front 43

What did maxwell do?

Back 43

he worked out the theory of electromagnetic waves. he discovered and developed it.

Front 44

What is the electromagnetic wave theory?

Back 44

<look up answer in book>

Front 45

λ

Back 45

lambda...equals wave length

Front 46

v

Back 46

frequency

Front 47

What's the product of frequency wavelength. (equation)

Back 47

v=λc

Front 48

diffraction

Back 48

demonstration of the wave nature of light. when the colors of light are split up.

Front 49

What are two different theories of atoms?

Back 49

daltons (incorrect)
rutherford (correct, used today)

Front 50

What's the ultraviolete catastrophe

Back 50

possible wave theory that predicts the light emitted from the human body would contain increasing amounts of energy as wavelengths get shorter. it is false because we know actually know if it is true.

Front 51

Quantum theory

Back 51

<look up, make it sound better and easier to remember>

Front 52

What is the photo electric effect?

Back 52

Light of a short enough wavelength shining onto a metal plate can eject electrons.

Front 53

Explain the threshold of light intensity

Back 53

there is a threshold of light intensity where the short wave lenght, the intensity of light is directly proportional to the number of electrons emitted

Front 54

How do electrons and photons react?

Back 54

one-to-one
one photon gives all its energy to one electron.

Front 55

What happenes when a photon has excess energy

Back 55

the electron will come out with the excess energy of the electron.

Front 56

How did Bohr eleborate on Rutherford's atomic theory?

Back 56

he applied quantum ideas to his idea. He thought the atom was stable with non-radiating orbits.

Front 57

Planks constants

Back 57

<look up>

Front 58

how do you calculate the energy of light

Back 58

energy = hν

h=wavelength
ν=planks constant

Front 59

When do electrons jump to a higher quantum level?

Back 59

When light is absorbed

Front 60

When do electrons jump to a lower quantum level?

Back 60

when light is emitted

Front 61

What did De broglie suggest?

Back 61

that particles should the wavelength lambda=h/mv
electrons demonstrate wavelike behavior

Front 62

who developed the quantum theory?

Back 62

schrodinger and meisenberg

Front 63

what did LoGuerre and Le Gendre do?

Back 63

mathmatitians the helped develope the diffriential equation

Front 64

What did LoGuerre's eqn have?

Back 64

polynomials in degree n

Front 65

what is "n"?

Back 65

principle quant number; size of the orbital

Front 66

what is "l"?

Back 66

angular momentum; shape of the orbital

Front 67

what is m (subsrcipt) l?

Back 67

Azimuthal quaqtum number; direction of orbial

Front 68

what is the wave function?

Back 68

it tells the probablity of finding an electron in space

Front 69

how do you find the probablitiy of finding an electron at r distance from the nucleus?

Back 69

multiply the square of the wave function by the volume over a radius elemet dr.

Front 70

how does the probability of finding an electron in sapce as the distance approaches the nucleus?

Back 70

probablity gets closer to zero

Front 71

what's the heisenberg uncertainty principle?

Back 71

you cannot know where an electron is at any given moment

Front 72

what are the properites of a wave?

Back 72

wavelength
frequency
amplitude

Front 73

what is diffraction?

Back 73

classical expermnt that demonstrates the wave nature of light

Front 74

what is mass number?

Back 74

protons and nuetron in the nucleus

Front 75

where is the mass number found?

Back 75

SUPERscript

Front 76

what is the nuclear charge?

Back 76

the proton count.

Front 77

where is the nuclear charge found?

Back 77

SUBscript

Front 78

what is "c"?

Back 78

constant for speed of light;
3 x10^8 m/s

Front 79

what did Mendeleeve do?

Back 79

he created the first real periodic table by showing that the elements could be grouped together based on chemcial properties

Front 80

how is scientific progress developed?

Back 80

through technology

Front 81

what 2 facts helped Dalton form his theory of the atom?

Back 81

1. law of constant proportionss

2. law of multiple proportoins

Front 82

what was Prout's hypothesis?

Back 82

H atoms were the foundation for all other atoms. this would explain the whole number mass ratio.

Front 83

what did volta's discovery lead to?

Back 83

the discovery of electryolis;

Front 84

whats the unit of J (joules)?

Back 84

kg * m^2 * s^-2

Front 85

Sailard

Back 85

chain rxn using hte analytical balance base off of aston

Front 86

hahn

Back 86

founded the uranium used for nuclear fusion

Front 87

how did davy discover electrolysis?

Back 87

by stick two batteried in water splitting the water into hydrogen and gas

Front 88

who is charles hall?

Back 88

found Al from boxide ore. Hall process.

Front 89

what did newton do for standing waves?

Back 89

said they were in a string of waves

Front 90

what did Huyghens do?

Back 90

he found the peaks and valleys of a wave. nodes

Front 91

what did young do?

Back 91

difraction; interference double split experiment

Front 92

what did Planck do?

Back 92

elctros come in a series of discret packets of energy

Front 93

what did hahn invent?

Back 93

part of the atomic bomb

Front 94

what did plank solve?

Back 94

the ultra violet castrophy

Front 95

What did de Broglie do?

Back 95

standing wave

Front 96

what's hunds rule

Back 96

orbitals of the same energy fill the orbitals up one electron at a time