LM9-10

Question 1

Failures of Classical Physics (2)

Answer 1

Emission spectra of hydrogen, photoelectric effect

Question 2

Wave-particle Duality

Answer 2

Light exhibits properties of both wave physics and particle physics

Question 3

Rydberg Equation

Answer 3

Used to determine wavelength of photon absorbed/emitted when electron is being ionized

Question 4

What does nl represent in the Rydberg equation

Answer 4

Final energy level (lower)

Question 5

What does nh represent in the Rydberg equation

Answer 5

Initial energy level (higher)

Question 6

Increasing frequency of a light hitting a metal does what to the ejected electrons?

Answer 6

Increases the speed at which they eject (kinetic energy)

Question 7

Increasing intensity of a light hitting a metal does what to the ejected electrons?

Answer 7

Increases the amount of electrons ejected

Question 8

Work function

Answer 8

Minimum quantity of energy required to remove an electron

Question 9

Photoelectric Effect

Answer 9

Use of a photon to produce an electron

Question 10

Kinetic energy of ejected electron equation simplified

Answer 10

KE = Energy of light - work function

Question 11

deBroglie equation for wave-particle duality of matter

Answer 11

Wavelength = planck’s constant / momentum

Question 12

How are wavelength and mass related?

Answer 12

Inverse relationship

Question 13

Electrons generate wavelengths in what unit?

Answer 13

Nanometers

Question 14

Protons generate wavelengths in what unit?

Answer 14

Picometers

Question 15

A 1g marble generates wavelengths in what unit?

Answer 15

10^-31 meters

Question 16

What experiment proved deBroglie’s theory?

Answer 16

Electron diffraction from electrons scattered by crystals

Question 17

Uncertainty principle

Answer 17

The inability to precisely pinpoint the location of an electron because it behaves like a wave

Question 18

Schrodinger’s solution to uncertainty principle

Answer 18

Use quantum mechanics to find the probability of where an electron is

Question 19

Quantum number n

Answer 19

Energy levels, distance of electrons from nucleus

Question 20

n correlates with what property of periodic table?

Answer 20

Period (energy level)

Question 21

Quantum number l

Answer 21

Angular momentum, shape of electron’s atomic orbital

Question 22

l correlates with what property of periodic table?

Answer 22

Blocks

Question 23

Quantum number ml

Answer 23

Magnetic moment, explains orientation of atomic orbital

Question 24

ml correlates with what property of periodic table?

Answer 24

Size of blocks in number of groups

Question 25

Quantum number ms

Answer 25

Electron spin, orientation of electron’s spin in atomic orbital

Question 26

Rydberg’s constant

Answer 26

3.3 x 10^15 Hz

Question 27

To what kind of atoms does Rydberg’s equation apply?

Answer 27

To atoms with one electron

Question 28

Modified Rydberg’s equation

Answer 28

Wavenumber = RZ^2((1/nl^2)-(1/nh^2))

Question 29

Wavenumber

Answer 29

1/wavelength