Module 6: Quantum Mechanics

Question 1

He extended the wave-particle duality of light that Einstein used to resolve the photoelectric-effect paradox to material particles

Answer 1

Louis de Broglie

Question 2

he predicted that a particle should also exhibit the behavior of a wave

Answer 2

Louis de Broglie

Question 3

Formula for de Broglie wavelength

Answer 3

λ = h / mV

Question 4

Is de Broglie wavelength not a characteristic of particles?

Answer 4

No

Question 5

two scientists that demonstrated experimentally that electrons can exhibit wavelike behavior

Answer 5

C.J. Davisson and L.H. Germer

Question 6

Field of study that includes quantization of energy, wave-particle duality, and the Heisenberg uncertainty principle to describe matter

Answer 6

Quantum Mechanics

Question 7

This principle states that it is fundamentally impossible to determine simultaneously and exactly both the momentum and the position of a particle

Answer 7

Heisenberg Uncertainty Principle

Question 8

Unlike de Broglie who thought of the electron in terms of circular stationary waves, this person properly though in terms of three-dimensional stationary waves

Answer 8

Schrodinger

Question 9

three-dimensional stationary waves that Schrodinger thought of

Answer 9

Wavefunction (ψ)

Question 10

Who proposed the interpretation of wavefunction?

Answer 10

Max Born

Question 11

he said that electrons are still particles and so the waves represented by ψ are not physical waves but are complex probability amplitudes

Answer 11

Max Born

Question 12

the square of this describes the probability of the quantum particle being present near a certain location in space

Answer 12

Wavefunction (ψ)

Question 13

It can be used to determine the distribution of the electron’s density

Answer 13

Wavefunction (ψ)

Question 14

This describe the location or general description of an electron

Answer 14

Quantum numbers

Question 15

A general region in an atom within which an electron is most probable to reside

Answer 15

Atomic orbital

Question 16

The four quantum numbers

Answer 16

principal
angular momentum
magnetic
spin

Question 17

this quantum number specify the shell an electron occupies in an atom

Answer 17

Principal quantum number (n)

Question 18

this quantum number defines the location of the energy level and general size and energy of the orbital

Answer 18

Principal quantum number (n)

Question 19

this quantum number determines the average distance form nucleus

Answer 19

Principal quantum number (n)

Question 20

This quantum number’s values are 1, 2, 3, 4, ..

Answer 20

Principal quantum number (n)

Question 21

As the principal quantum number (n), what happens to the distance from the nucleus and energy?

Answer 21

Increases

Question 22

This quantum number defines the shape of the orbital which is dependent on where you can probably find electrons

Answer 22

Angular Momentum Quantum Number (l)

Question 23

This quantum number is also known as the subshell

Answer 23

Angular Momentum Quantum Number (l)

Question 24

This quantum number’s values are 0, 1, 2, (n-1)

Answer 24

Angular Momentum Quantum Number (l)

Question 25

This quantum number describes the orientation of the orbital in space

Answer 25

Magnetic Quantum Number (ml)

Question 26

This quantum indicates the region that an electron occupies within a subshell based on the shape of the subshell

Answer 26

Magnetic Quantum Number (ml)

Question 27

This quantum number's values are 0, +1, -1, +2, -2, (-l to +l)

Answer 27

Magnetic Quantum Number (ml)

Question 28

This quantum number describes the orientation of electron spin

Answer 28

Spin Quantum Number (s)

Question 29

A completely quantum phenomenon with no analogous in the classic al realm

Answer 29

Electron spin

Question 30

Describes an intrinsic electron "rotating" or "spinning"

Answer 30

Electron Spin

Question 31

This quantum number states that each electron acts as atiny magnet with an angular momentum, even though this rotation cannot be observed in terms of the spatial coordinates

Answer 31

Spin Quantum Number (s)

Question 32

This quantum number's values are either +1/2 or -1/2

Answer 32

Spin Quantum Number (s)

Question 33

Value of spin quantum number (s) with a slightly higher energy in an external field than the other

Answer 33

s = -1/2

Question 34

Principle that states no two electrons in the same atom can have exactly the same set of all the four quantum number

Answer 34

Pauli Exclusion Principle

Question 35

Which orbital have the lowest energy

Answer 35

Orbitals closest to the nucleus of an atom

Question 36

lowest to highest energy of subshells

Answer 36

s < p < d < f

Question 37

This is the arrangement of electrons in the orbitals of an atom

Answer 37

Electron Configuration

Question 38

Three information that an electron configuration have

Answer 38

Principal quantum number (n) Orbital type (subshell ,l) number of electrons in a particular subshell

Question 39

unpaired electrons that behave like a magnet and attract others

Answer 39

Paramagnetic

Question 40

Principle that states that the procedure in which the electron configuration of the elements is determined by "building" them in order of atomic number

Answer 40

Aufbau Principle

Question 41

Principle that states that lowest energy level should be filled up first before the higher energy levels

Answer 41

Aufbau Principle

Question 42

writing the electron configuration by abbreviation using the noble gas closest to the atom

Answer 42

Abbreviated Electron Configuration

Question 43

the electron occupying the inner shell orbitals

Answer 43

Core Electrons

Question 44

outer-shell electrons

Answer 44

Valence Electrons

Question 45

type of electrons that correspond to noble gases electron configuration

Answer 45

Core Electrons

Question 46

type of electrons that heavily contribute to an element's properties and they are the electrons involved in chemical bonding

Answer 46

Valence Electrons

Question 47

pictorial representations of the electron configuration, showing the individual orbitals and the pairing arrangement of electrons

Answer 47

Orbital diagrams

Question 48

Electron configuration that is exceptions to the order of filling of orbitals that are indicated by Aufbau principle

Answer 48

Anomalous Electron Configuration

Question 49

for this type of electron configuration, half-filled and completely-filled subshells apparently represent conditions of preferred stability

Answer 49

Anomalous Electron Configuration

Question 50

electron configuration exceptions because the magnitude of the repulsion between electrons is greater than the differences in energy between subshells

Answer 50

Anomalous Electron Configuration

Question 51

meaning of s, p, d and f?

Answer 51

sharp principal diffused fundamental

Question 52

formula for number of orbitals in a subshell

Answer 52

2l + 1

Question 53

formula for total number of orbital

Answer 53

n e2 (n squared)

Question 54

formula for maximum number of electrons

Answer 54

2n e2 ( 2 n squared)