Ch301 Test #1 Ep 5-8

Question 1

What is the photo electric effect

Answer 1

Shining light (usually UV) onto metal surface in vacuum could cause e- to be ejected from metal surface if it’s on or above the metals threshold frequency

Question 2

What is the work function

Answer 2

Amount of E required to remove ONE e- from metals surface in a vacuum

always a small amount of E no matter the metal

Question 3

If hv<Φ

Answer 3

Then there is not enough E to remove an e- from the metal

Question 4

If hv> Φ

Answer 4

Then there is enough E to remove an e- from the metal in the vacuum

Question 5

What happens if you increase the brightness of the light

PE

Answer 5

Ejects more electrons but they have the same KE as b4

Question 6

What happens if you increase the freuqncy (hertz) of the light?

Answer 6

Same number of electrons are ejected but with a higher KE

Question 7

Einstein explanation of light

Answer 7

Light acts like tiny particles or wave packets, each packet ejected one e-

Einstein is wrong and right because light doesn’t only behave like a particle

Question 8

What’s is the relationship w E of light and frequency

Answer 8

Higher frequency means the light particle has more E

Question 9

Which has greater E

Red or blue light

Answer 9

Blue light

Question 10

Ephoton equation

Answer 10

Ephoton = Φ + KEelctron

Question 11

In the PE effect high E photons can do what?

Answer 11

Remove an e- from almost anythang whether in a vacuum or not

Question 12

Wave particle duality

Answer 12

Energy waves can also be energy particles

Question 13

Louis Debroglie theory

Answer 13

Matter particles can also be matter waves

Question 14

Debroglie equation

Answer 14

λ=h/mV

Question 15

Schrödinger theory

Answer 15

Created math model that treats e- as waves instead of particles,

A standing matter wave around the nucleus

Each following subshell has higher E than before

Question 16

What’s do Energies tell us(Schrödinger equaiton)

Answer 16

E of e-

Question 17

What do wave functions tell us?(Schrödinger equation)

Answer 17

Tell us probability of finding the e- at a given position

Question 18

What are the regions in space e- are found

Answer 18

Orbitals

Question 19

Can we ever know exactly where e- are?

Answer 19

No but we can find probability of finding e- at any given distance from the nucleus

Question 20

S orbital shape

Answer 20

One big circle

Question 21

P orbital shape

Answer 21

2 half circles

Question 22

D orbitals shape

Answer 22

4 quarter circles

Question 23

Graph of likelihood of finding the e- vs the distance from the nucleus is called…

Answer 23

Radial distribution function

Question 24

What are quantum numbers

Answer 24

The “address” of the e-

Question 25

What’s re the 4quantum numbers

Answer 25

N l ml ms

Question 26

What’s does the quantum number l tell us

Answer 26

The shape of each orbital for each e-

Question 27

Pauli exclusion principle

Answer 27

In a given atom no 2 e- can have the same set of 4 quantum numbers An orbital can hold a max of 2 e- and they must have opp spins

Question 28

What does n quantum number determine

Answer 28

Size and E of orbital

Question 29

What does ml quantum number determine

Answer 29

Orientation of orbital Distinguishes between diff orbitals in same sub shell

Question 30

What does ms quantum number determine

Answer 30

Spin on the e-

Question 31

When does it take more E to remove an e-?

Answer 31

When its from a metal w a higher min threshold frequency

Question 32

Altering light brightness alter

Answer 32

Number of e-

Question 33

Altering light frequency alters?

Answer 33

KE

Question 34

When choosing solutions for electron config we f always chose

Answer 34

Lowest E solutions

Question 35

What is l for s subshell

Answer 35

0

Question 36

What is l for p subshell

Answer 36

1

Question 37

What is l for d subshell

Answer 37

2

Question 38

What is l for f subshell

Answer 38

3

Question 39

How to find the ml, magnetic quantum number?

Answer 39

Any Values ranging from -l to +l 0 always works

Question 40

How to find spin magnetic, ms?

Answer 40

Always be consistent Make up arrow positive and down arrow negative

Question 41

Energy level ,n,for s block?

Answer 41

Same as row that e- is in

Question 41

Energy level ,n,for p block?

Answer 41

Same as row that e- is in

Question 42

Energy level ,n,for d block?

Answer 42

1 less than row that e- is in in d block

Question 43

Energy level ,n,for f block?

Answer 43

2 less than row that e- is in in f block

Question 44

What happned if you change energy of light

Answer 44

Increased KE

Question 45

What happens if you increase the intensity

Answer 45

Same KE but more electrons ejected

Question 46

Zeff = ?

Answer 46

Z(atomic #) - number of inner shell e-

Question 47

Formula speed of wave

Answer 47

Wavelength times frequency

Question 48

What is MHz

Answer 48

Megahertz is 10^6 hertz

Question 49

Define quantized

Answer 49

Can only have specific values, like atomic line emission spectra

Question 50

What does low frequency mean

Answer 50

Hi wavelength

Question 51

only use final and initial for??

Answer 51

Change in e, Otherwise smallest is first then largest

Question 52

When electrons are removed in IE , in which order are they removed?

Answer 52

Highest to lowest E

Question 53

Which has higher E d subshell or s subshell

Answer 53

S subshell

Question 54

3s and 3p subshells are degenerate in E for

Answer 54

One electron systems

Question 55

What is the visible light wavelength range in nm

Answer 55

400-700 nm

Question 56

If a full spectrum of vis light passes thru a cloud cold hydrogen atoms before reaching earth, what would the vis spectrum from the star look to earth

Answer 56

Full vis spectrum w 4 wavelengths and rest of spectrum missing

Question 57

Mole concept is important to chem because

Answer 57

It allows us to count atoms and molecules by weighing macroscopic amounts of material