Quantum Mechanics

Question 1

3 basic ideas of QUANTUM MECHANICS

Answer 1

1. atoms/molecules ONLY EXIST at certain energy states
2. there is CHANGE in ENERGY upon absorption and emission of light
3. the ALLOWED ENERGY STATES are described by QUANTUM NUMBERS

Question 2

definition of ORBITAL (2)

Answer 2

• REGION in atom where e- is most probable
• described by n, l, and ml

Question 3

maximum # of e- that a region can hold

Answer 3

2

Question 4

QUANTUM NUMBERS

MAIN energy level/shell of e- (radius lines around nucleus)

Answer 4

principle qn (n)

Question 5

QUANTUM NUMBERS

describes the size of an orbital

Answer 5

principle qn (n)

Question 6

QUANTUM NUMBERS

takes integer value starting from 1

Answer 6

principle qn (n)

Question 7

QUANTUM NUMBERS

subshells

Answer 7

azimuthal qn (l)

Question 8

QUANTUM NUMBERS

describes shape of an orbital

Answer 8

azimuthal qn (l)

Question 9

QUANTUM NUMBERS

the s, p, d, f orbitals

Answer 9

azimuthal qn (l)

Question 10

QUANTUM NUMBERS

has values 0 to n-1

Answer 10

azimuthal qn (l)

Question 11

find the subshell for the respective azimuthal values:

l = 0
l = 1
l = 2
l = 3

Answer 11

s
p
d
f

Question 12

how many orbitals per subshell?

Answer 12

s = 1
p = 3
d = 5
f = 7

Question 13

QUANTUM NUMBERS

spatial orientation

Answer 13

magnetic qn (ml)

Question 14

QUANTUM NUMBERS

covers # of degenerate (same energy) orbitals per subshell

Answer 14

magnetic qn (ml)

Question 15

QUANTUM NUMBERS

has values from -l to +l

Answer 15

magnetic qn (ml)

Question 16

QUANTUM NUMBERS

electron spin

Answer 16

spin qn (ms)

Question 17

define ELECTRONIC CONFIGURATION

Answer 17

arrangement of e- in ground state

Question 18

3 principles in ELECTRONIC CONFIGURATION

“Building-up” Principle

Answer 18

Aufbau

Question 19

3 principles in ELECTRONIC CONFIGURATION

orbitals are filled w increasing energy

Answer 19

Aufbau

Question 20

3 principles in ELECTRONIC CONFIGURATION

determined by the (n + l) rule

Answer 20

Aufbau

Question 21

3 principles in ELECTRONIC CONFIGURATION

degenerate orbitals are FIRST singly occupied

Answer 21

Hund’s Rule of Multiplicity

Question 22

3 principles in ELECTRONIC CONFIGURATION

unpaired e- must have parallel spins

Answer 22

Hund’s rule of multiplicity

Question 23

3 principles in ELECTRONIC CONFIGURATION

no two e- have the same quantum #

Answer 23

Paul’s exclusion