Ch301 test #1 Ep1-4 Flashcards

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

A

1/λ =R((1/n^2¥1) -(1/n^2¥2))

22
Q

Are emissions lines random

A

No there’s a mathematical pattern

23
Q

Bohr model

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

A

Atoms w more than 1 e-

25
Q

What equations only work w atoms w one electron?

A

Bohr model and Rydberg equation

26
Q

Does emission spectra vary btwn elements

A

Yes, E levels for diff elements have diff E

27
Q

Rydberg Constant

A

1.097*10^7 m^-1

28
Q

Frequency and wavelength have what relationship

A

Have inverse relationship

29
Q

What is wavelength

A

Distance from peak to peak

30
Q

Frequency

A

# of peaks that pass a point in space in 1 sec, units are per sec (s^-1)

31
Q

What unit is wavelength

A

Meters

32
Q

What unit is frequency

A

Hertz

1/sec or s^-1

33
Q

What is light?

2 parts

A

Form of energy moving in a straight path

Made of 2 interacting waves

34
Q

What 2 interesting waves is light made of

A

Magnetic field wave and electromagnetic wave

35
Q

Red wavelength

A

Absolute Left

Lowest E

λ=700 nm

36
Q

Blue wavelength

A

Blue is the absolute right

λ=400 nm, highest E

37
Q

How do you get a more intense color display

A

Burn more atoms

38
Q

4 possible options for when light encounters matter

A

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
Q

What’s another word for light

A

EM radiation

Electromagnetic radiation

40
Q

What’s the Planck equation

A

E=hv

41
Q

What is E in words(in Plancks equation)

A

E is the total E in Joules of a single photon w a frequency of v(nu)

42
Q

What does Ephoton =

A

Ephoton = hc/λ

43
Q

What color is white light

A

ALL the colors

44
Q

If H atoms are heated or electrically excited it gives off?

A

Emission spectrum

45
Q

If continuous stream of visible light is passed thru sample of H atoms?

A

They absorb light but only at specific wave lengths

Absorbance spectrum

46
Q

Even though hydrogen is a diatomic gas

A

It exists as individual atoms

47
Q

If light is being emitted what happens to the E of the e-

A

It decreases

48
Q

When e- drops E level what happens to the wavelength

A

It is predicted that the wavelength of light is given off

49
Q

When do e- absorb E?

A

When e- transition to higher E level

50
Q

What does R equal

A

3.29*10^15 hertz