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chemistryyyy > Ch301 test #1 Ep1-4 > Flashcards

Ch301 test #1 Ep1-4 Flashcards

(50 cards)

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1
Q

λ

A

Wavelength

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2
Q

ν

A

Frequency

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3
Q

Speed of light numerical value

A

3.0 * 10^8 m/s

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4
Q

Speed of light equation

A

c=ν(λ)

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5
Q

Density of water

A

1 g/mL at 25 degrees C

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6
Q

1 Angstrom to m?

A

1A =10^-10 m

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7
Q

1 cm^3 to ml?

A

1 mL

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8
Q

1 inch to cm?

A

2.54 cm

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9
Q

Nano to meters

20

A

20*10^-9

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10
Q

Electromagnetic spectrum ranking
Smallest to largest frequency
Largest to smallest wavelength
#1

A

Radio

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11
Q

Electromagnetic spectrum ranking
Smallest to largest frequency
Largest to smallest wavelength
#2

A

Microwave

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12
Q

Electromagnetic spectrum ranking
Smallest to largest frequency
Largest to smallest wavelength
#3

A

Infrared

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13
Q

Electromagnetic spectrum ranking
Smallest to largest frequency
Largest to smallest wavelength
#4

A

Visible

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14
Q

Electromagnetic spectrum ranking
Smallest to largest frequency
Largest to smallest wavelength
#5

A

UV

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15
Q

Electromagnetic spectrum ranking
Smallest to largest frequency
Largest to smallest wavelength
#6

A

X-ray

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16
Q

Electromagnetic spectrum ranking
Smallest to largest frequency
Largest to smallest wavelength
#7

A

Gamma ray

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17
Q

Visible spectrum colors

A

Red
Orange
Yellow
Green
Blue
Violet

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18
Q

Continuous spectrum

A

Has all wavelengths with no gaps over wide range

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19
Q

Emission spectrum

A

e- in excited State moves to a lower E level, emits a certain amount of E as photons

Glowing hot gas emit lines of light

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20
Q

Absorption spectrum

A

e- absorb E from a source to go from lower E to higher E level

Tendency of cool atmospheric gas to absorb same lines of light as absorption lines

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21
Q

Equation to predict spectral lines of H

Study These Flashcards
A

1/λ =R((1/n^2¥1) -(1/n^2¥2))

22
Q

Are emissions lines random

Study These Flashcards
A

No there’s a mathematical pattern

23
Q

Bohr model

Study These Flashcards
A

e- can only be at certain distances from nucleus, their E are quantized
Only for H

24
Q

Bohr model doesn’t work w

Study These Flashcards
A

Atoms w more than 1 e-

25
What equations only work w atoms w one electron?
Bohr model and Rydberg equation
26
Does emission spectra vary btwn elements
Yes, E levels for diff elements have diff E
27
Rydberg Constant
1.097*10^7 m^-1
28
Frequency and wavelength have what relationship
Have inverse relationship
29
What is wavelength
Distance from peak to peak
30
Frequency
# of peaks that pass a point in space in 1 sec, units are per sec (s^-1)
31
What unit is wavelength
Meters
32
What unit is frequency
Hertz 1/sec or s^-1
33
What is light? 2 parts
Form of energy moving in a straight path Made of 2 interacting waves
34
What 2 interesting waves is light made of
Magnetic field wave and electromagnetic wave
35
Red wavelength
Absolute Left Lowest E λ=700 nm
36
Blue wavelength
Blue is the absolute right λ=400 nm, highest E
37
How do you get a more intense color display
Burn more atoms
38
4 possible options for when light encounters matter
1)light passes thru matter unaffected 2)the path of light bends as light passes thru matter 3) light bounces off surface of matter 4) light is absorbed by matter
39
What’s another word for light
EM radiation Electromagnetic radiation
40
What’s the Planck equation
E=hv
41
What is E in words(in Plancks equation)
E is the total E in Joules of a single photon w a frequency of v(nu)
42
What does Ephoton =
Ephoton = hc/λ
43
What color is white light
ALL the colors
44
If H atoms are heated or electrically excited it gives off?
Emission spectrum
45
If continuous stream of visible light is passed thru sample of H atoms?
They absorb light but only at specific wave lengths Absorbance spectrum
46
Even though hydrogen is a diatomic gas
It exists as individual atoms
47
If light is being emitted what happens to the E of the e-
It decreases
48
When e- drops E level what happens to the wavelength
It is predicted that the wavelength of light is given off
49
When do e- absorb E?
When e- transition to higher E level
50
What does R equal
3.29*10^15 hertz

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