Lecture 8: Electrons as Waves, Quantum Numbers

Question 1

Limitations of the bohr model

Answer 1

-only works for 1 electron
-doesn’t explain quantized energy just assumes it true
-doesn’t explain why electrons don’t fall into nucleus

Question 2

de broglie hypothesis

Answer 2

if light can have
wave/particle duality, can matter exhibit
wave/particle duality?

Question 3

de broglie wavelength

Answer 3

Any moving mass has a wavelength λ =ℎ/𝑚v

Question 4

Electron diffraction

Answer 4

electrons through crystal showed diffraction proving they are waves not just particles

Question 5

electrons don’t fall into the nucleus because

Answer 5

they are waves

Question 6

Waves that are bounded can form

Answer 6

standing waves

Question 7

Heisenberg Uncertainty Principle

Answer 7

There is a fundamental limit on how accurately we can measure position and momentum simultaneously

Question 8

Solutions to SCHRÖDINGER’s Wave Equation describe

Answer 8

allowed energy states of an electron in H

Question 9

SCHRÖDINGER’s Wave Equation is the theoretical foundation for

Answer 9

quantizing the energy of electrons
= wave-particle duality

Question 10

ψ describes

Answer 10

an allowed energy state

Question 11

ψ2 describes

Answer 11

probability density (Orbital)

Question 12

n

Answer 12

principle quantum number

Question 13

L (special L)

Answer 13

angular momentum quantum number

Question 14

ml (m subscript L)

Answer 14

magnetic quantum number

Question 15

principle quantum number determines

Answer 15

size and energy of an orbital (shell)

Question 16

angular momentum number describes

Answer 16

shape of an orbital (subshell)

Question 17

magnetic quantum number describes

Answer 17

orientation of an orbital

Question 18

ms (m subscript s)

Answer 18

spin quantum number

Question 19

spin quantum number describes

Answer 19

up or down spin of an electron