Unit 2: Atomic Theory & Quantum Mechanics

Question 1

As effective nuclear charge increases, atomic radius ______________

Answer 1

decreases

Question 2

largest energy gap is between n=_ and n=_

Answer 2

1, 2

Question 3

how to convert from nm to m

Answer 3

multiply nm by 10^-9

Question 4

l = 0

Answer 4

s orbital

Question 5

l = 1

Answer 5

p orbital

Question 6

l = 2

Answer 6

d orbital

Question 7

l = 3

Answer 7

f orbital

Question 8

visible light is only from energy gaps n=_ to n=_

Answer 8

2, 6

Question 9

wavelength is the ____________ from peak to peak

Answer 9

distance

Question 10

each element has an ______________ spectrum unique from all others

Answer 10

emission

Question 11

bohr model and rydberg equation only works for atoms with only ________ electron

Answer 11

one

Question 12

the work function of a metal….

Answer 12

is the amount of energy required to remove an electron from the metal’s surface in a vacuum

Question 13

hv < work function

Answer 13

no electrons ejected

Question 14

hv > work function

Answer 14

electrons ejected

Question 15

light is a form of energy that can behave sometimes like a ____________ and sometimes like a _____________

Answer 15

wave, particle
(wave-particle duality)

Question 16

short wavelength = _________ energy

Answer 16

high

Question 17

DeBroglie equation formula

Answer 17

wavelength = h/mv

Question 18

Pauli Exclusion Principle

Answer 18

In a given atom, no two electrons can have the same quantum numbers.
An orbital can hold a maximum of two electrons and they must have opposite spin.

Question 19

all subshells in an energy level are ______________

Answer 19

degenerate

Question 20

Aufbau principle

Answer 20

electrons fill from lowest energy to highest energy orbitals

Question 21

Hund’s rule

Answer 21

electrons fill degenerate orbitals singly before pairing up

Question 22

diamagnetic

Answer 22

all paired electrons

Question 23

paramagnetic

Answer 23

some unpaired electrons

Question 24

effective nuclear charge (Zeff)

Answer 24

attraction to the nucleus felt by the outermost electrons in an atom

Question 25

effective nuclear charge formula

Answer 25

atomic # - # of inner shell electrons

Question 26

ionization energy

Answer 26

the amount of energy required to remove the first electron from a neutral atom in the gaseous state

Question 27

electron affinity

Answer 27

the change in energy when an electron is added to a gaseous atom to form an anion

Question 28

electronegativity

Answer 28

how strongly an atom pulls electrons when bonded to another atom

Question 29

Aufbau exceptions

Answer 29

Au, Ag, Cu, Cr, Mo